[XPERIA X10 Android Development] mister-g1:
Okay, here is what I have installed (red marked shows widget in use, green marked for most of the time running):

Air Control Lite: http://market.android.com/details?id=dk.logisoft.aircontrol

AlarmDroid: http://market.android.com/details?id=com.splunchy.android.alarmclock

Alchemie: http://market.android.com/details?id=me.zed_0xff.android.alchemy

Andoku: http://market.android.com/details?id=com.googlecode.andoku

Angry Birds: http://market.android.com/details?id=com.rovio.angrybirds

Announcify: http://market.android.com/details?id=org.mailboxer.saymyname

AudioManager Pro: http://market.android.com/details?id=com.smartandroidapps.audiowidgetpro

barcoo: http://market.android.com/details?id=de.barcoo.android

Beautiful Widgets: http://market.android.com/details?id=com.levelup.beautifulwidgets

Beautiful Widgets Animations Addon: http://market.android.com/details?id=com.levelup.bw.forecast

Bubble: http://market.android.com/details?id=bz.ktk.bubble

Burn the Rope: http://market.android.com/details?id=com.bbb.btr

Business Calendar Free: http://market.android.com/details?id=netgenius.bizcal

c:geo: http://market.android.com/details?id=carnero.cgeo

ColorNote: http://market.android.com/details?id=com.socialnmobile.dictapps.notepad.color.note

Documents To Go: http://market.android.com/details?id=com.dataviz.docstogo

EboBirthday: http://market.android.com/details?id=com.ebomike.ebobirthday

Extended Controls: http://market.android.com/details?id=com.extendedcontrols

Facebook: http://market.android.com/details?id=com.facebook.katana

Fish Food: http://market.android.com/details?id=com.tommoor.fishfood

Gala S Theme: http://market.android.com/details?id=com.haxzamatic.adwgala

Galerie: http://market.android.com/details?id=com.laac.galleryLauncher

Galerie: http://market.android.com/details?id=com.cooliris.media

GCC: http://market.android.com/details?id=eisbehr.gcc

Geocaching4Locus: http://market.android.com/details?id=com.arcao.geocaching4locus

Google Sky Map: http://market.android.com/details?id=com.google.android.stardroid

GPS Status: http://market.android.com/details?id=com.eclipsim.gpsstatus2

gStrings Free: http://market.android.com/details?id=org.cohortor.gstrings

Handcent Sms: http://market.android.com/details?id=com.handcent.nextsms

Handcent SMS Germany Language Pack: http://market.android.com/details?id=com.handcent.lang.nextsms.de

HTC_IME mod: http://market.android.com/details?id=jonasl.ime

imo: http://market.android.com/details?id=com.imo.android.imoim

K-9 Mail: http://market.android.com/details?id=com.fsck.k9

Kalender: http://market.android.com/details?id=com.android.calendar

Keyboard Calibration: http://market.android.com/details?id=com.htc.clicker

LAN (Windows-Freigaben): http://market.android.com/details?id=com.android.tcplugins.LAN

Linpack for Android: http://market.android.com/details?id=com.greenecomputing.linpack

Locus Free: http://market.android.com/details?id=menion.android.locus

Maps: http://market.android.com/details?id=com.google.android.apps.maps

Minecraft Canary: http://market.android.com/details?id=com.ninjacoders.mcanary

Miren Browser: http://market.android.com/details?id=cn.miren.browser

mVideoPlayer: http://market.android.com/details?id=afzkl.development.mVideoPlayer

My Tracks: http://market.android.com/details?id=com.google.android.maps.mytracks

MyPhoneExplorer Client: http://market.android.com/details?id=com.fjsoft.myphoneexplorer.client

Navigon: http://market.android.com/details?id=com.navigon.navigator

NeoReader: http://market.android.com/details?id=de.gavitec.android

Opera Mobile: http://market.android.com/details?id=com.opera.browser

Panorama beta: http://market.android.com/details?id=com.sonyericsson.panorama

PowerAMP: http://market.android.com/details?id=com.maxmpz.audioplayer

Programm Manager: http://market.android.com/details?id=de.telekom.android.epg

Quadrant Standard: http://market.android.com/details?id=com.aurorasoftworks.quadrant.ui.standard

QuickPic: http://market.android.com/details?id=com.alensw.PicFolder

Rechner: http://market.android.com/details?id=com.android.calculator2

Root Explorer: http://market.android.com/details?id=com.speedsoftware.rootexplorer

ShareMyApps: http://market.android.com/details?id=com.mattlary.shareMyApps

Skype: http://market.android.com/details?id=com.skype.raider

Slice It!: http://market.android.com/details?id=com.com2us.sliceit

Solitaire: http://market.android.com/details?id=com.kmagic.solitaire

Sprachsuche: http://market.android.com/details?id=com.google.android.voicesearch

Sprachwahl: http://market.android.com/details?id=com.android.voicedialer

Stoppuhr: http://market.android.com/details?id=com.sportstracklive.stopwatch

Street View: http://market.android.com/details?id=com.google.android.street

SwiftKey: http://market.android.com/details?id=com.touchtype.swiftkey

SyncMyPix: http://market.android.com/details?id=com.nloko.android.syncmypix

Timeriffic: http://market.android.com/details?id=com.alfray.timeriffic

Titanium Backup: http://market.android.com/details?id=com.keramidas.TitaniumBackup

Total Commander: http://market.android.com/details?id=com.ghisler.android.TotalCommander

TrackID™: http://market.android.com/details?id=com.sonyericsson.trackid3.client

Vignette (new version): http://market.android.com/details?id=uk.co.neilandtheresa.NewVignette

WebSharing: http://market.android.com/details?id=nextapp.websharing.r1

Wecker: http://market.android.com/details?id=com.android.alarmclock

WikiDroyd: http://market.android.com/details?id=com.osa.android.wikidroyd

XDA: http://market.android.com/details?id=com.quoord.tapatalkxda.activity

XPERIA FlashLight: http://market.android.com/details?id=jp.co.telemarks.ledlightx10

YouTube: http://market.android.com/details?id=com.google.android.youtube