[Sony Ericsson Xperia Mini, Mini Pro, Xperia Pro, A] Someguyfromhell:
AccessoryKeyDispatcher - Can be removed, never noticed any difference myself.

AddWidget - Required for adding widgets to home screens.

adobereader - Regular Adobe Reader, remove if you don't need it.

AntHalService - Required for ANT+, remove if you don't use it.

antradioservice - Required for ANT+, remove if you don't use it.

antstatenotifer - Required for ANT+, remove if you don't use it.

AppEnabler - Not sure, however safer to keep.

ApplicationsProvider - Search Applications Provider (ASP service)

AudioEffectService - Audio Service, required for audio effects(if I am not mistaken).

Bluetooth - Required in order to use Bluetooth.

bootinfo - Download Agent

Browser - Stock Internet Browser, you can remove if you use 3rd-party browser from Play Store.

Calculator - Calculator app.

CalendarProvider - Calendar Storage, used to save all the stuff saved in Calendar.

CameraExtensionPermission - Not sure, however safer to keep.

CdfInfoAccessor - Related to Software Component Descriptions, can be removed, didn't notice any difference myself.

CertInstaller - Certificate Installer, required by system.

chinesetextinput - Chinese Keyboard, remove if you don't use it.

ChromeBookmarksSyncAdapter - Keep if you need to sync your bookmarks in the stock ICS browser. Safe to remove if you don't need it.

ContactsImport - Importing contacts to the Contacts app, required by system.

Conversations - SMS app, required.

crashmonitorhelper - Can be removed, only used in certain crash cases, didn't notice difference myself.

CredentialManagerService - Required by system.

CustomizationProvider - Related to personal customization in your region, required by system.

CustomizedApplicationInstaller - Related to personal customization in your region, required by system.

CustomizedSettings - Related to personal customization in your region, required by system.

datatrafficswitch - Widget to turn on/off your data, can be removed if you don't use the widget.

DefaultCapabilities - Related to hardware, required by system.

DefaultContainerService - Package Access Helper, required by system.

DefaultThemes - Themes in your system, required by system.

DigitalClockWidget - Clock widget, keep if you need it. If not, can be removed.

DownloadProvider - Required to download stuff from Market.

DownloadProviderUi - Default Browser downloads folder, can be removed.

DrmDialogs - DRM service, required by system.

DrmProvider - DRM service, required by system.

enhancedusbux - USB driver, required by system.

EventStream - Timescape, can be removed if not needed.

EventStreamPluginCallLog - Timescape, can be removed if not needed.

EventStreamPluginFacebook - Timescape, can be removed if not needed.

EventStreamPluginTelephony - Timescape, can be removed if not needed.

EventStreamPluginTwitter - Timescape, can be removed if not needed.

Exchange - Required for Microsoft Exchange Services, can be removed if not needed.

facebook - Facebook app, can be removed. You can remove it and install new one from Market(then remove this, because it will not be used).

FastDormancy - Network Fast Dormancy, required by system.

FBCalendarSync - Facebook in Xperia, can be removed if not needed.

FBIAppShare - Facebook in Xperia, can be removed if not needed.

FBMediaDiscovery - Facebook in Xperia, can be removed if not needed.

FBMusicLike - Facebook in Xperia, can be removed if not needed.

FBSetupwizard - Facebook in Xperia, can be removed if not needed.

FmRxService - FM Radio Receiver, required by system.

Galaxy4 - If I am not mistaken, it is one of the Live Wallpapers...Someone correct me if I am wrong.

Gallery2 - Stock Gallery App, required by system.

GenericApplicationInstaller - App Installer, required by system.

GenieWidget - News and Weather widget, can be removed if not needed.

Gmail - Gmail app, can be removed if not needed.

GMS_Maps - Google Maps, can be removed if not needed.

GoogleBackupTransport - Google Backup stuff, can be removed if not needed.

GoogleCalendarSyncAdapter - Google Backup stuff, can be removed if not needed.

GoogleContactsSyncAdapter - Google Backup stuff, can be removed if not needed.

GoogleFeedback - Google Feedback, can be removed if not needed,

GoogleLoginService - Not sure, however safer to keep.

GoogleLyricsPlugin - Lyrics Plugin in Walkman app, can be removed if not needed.

GooglePartnerSetup - Not sure, however safer to keep.

GoogleQuickSearchBox - Google Search app and widget, can be removed if not needed.

GoogleServicesFramework - Google Services, remove ONLY if you DO NOT use Google Apps.

HoloSpiralWallpaper - Live Wallpaper, can be removed if not needed.

Home - Home launcher app, Remove ONLY if you have WORKING 3rd party launcher installed!! Else your phone will not work at all.

HTMLViewer - Default viewer for HTML files, can be removed if not needed.

InfiniteView - Contacts view app, required by system.

JapaneseIME - Japanese keyboard, can be removed if not needed.

KeyChain - Not sure, however safer to keep.

LearningClient - Learns the user typed new words, can be removed if not needed.

LiveWallpapersPicker - Used to pick live wallpapers, required by system.

livewaremanager - LiveWare Manager, can be removed if not needed.

LocalContacts - Phone Contacts App, required by system.

MarketUpdater - Market Updater app, required by system.

To be updated.

MediaProvider

MediaUploader

MediaWidget

MusicWidget

neoreader

NetworkLocation

NoiseField

OemCryptoReceiver

officesuite

OMAClientProvisioning

OmaDatasyncService

OmaDownload

OmaV1AgentDownloadServices

OneTimeInitializer

PackageInstaller

PhaseBeam

Phonebook

Phonesky

PhotoWidget

PicoTts

playnowclientarvato

PMSservice

PMSserviceTrigger

POBoxSknPink

POBoxSknWood

PostViewer

Protips

qcsemcservice

Radio

ReadyToRun

retaildemo

SecureClockJava

SemcCalendar

SemcCamera3D

SemcCameraUI

SemcCnapProvider

SemcContactsProvider

SemcCrashMonitor

SemcDeskClock

SemcDlna

SemcEmail

SEMCFacebookProxy

SemcGallery3D

SemcMusic

SemcPhone

SemcSettings

SEMCSetupWizard

SemcSnpPlatformUtil

SemcSnpVideoPlayer

SemcTelephonyProvider

SemcVideoEdit

ServiceMenu

Settings

SettingsProvider

SetupWizard

ShutDownAnimation

SimContacts

SmartSearch

SoundPicker

SoundRecorder

StatusSwitch

Stk

storefront

Street

Sync

SystemUI

Talk

talkback

TetherEntitlementCheck

textinput-tng

ThemeManager

TimescapeSpline

TimescapeWidget

trackid

UnsupportedHeadsetNotifier

UpdateCenter

usb-mtp-update-wrapper

usb-mtp-vendor-extension-service

UseragentProvider

UserDictionaryProvider

usersupport

VerifyCertificatesDummyAppApplication

VerifyCertificatesDummyAppMedia

VerifyCertificatesDummyAppPlatform

VerifyCertificatesDummyAppShared

VoiceDialer

VoiceSearch

VoipCallLogProvider

WallpaperPicker

WapiCustomization

WapPush

WeatherWidget

widgetanalogclock

widgetcalendar

widgetdigitalclock

widgetonoff

widgettimer

widgetworldclock

WikipediaPlugin

YouTube

YouTubeKaraokePlugin

YouTubePlugin