[Galaxy S I9000 Android Development] bingobingobingo:
If you want clock in the middle like on picture below,

you must edit status_bar.xml like this:

<?xml version="1.0" encoding="utf-8"?>
<com.android.systemui.statusbar.StatusBarView android:orientation="vertical" android:background="#ff000000" android:focusable="true" android:descendantFocusability="afterDescendants"
xmlns:android="http://schemas.android.com/apk/res/android">
<LinearLayout android:orientation="horizontal" android:id="@id/icons" android:layout_width="fill_parent" android:layout_height="fill_parent">
<com.android.systemui.statusbar.IconMerger android:gravity="center_vertical" android:orientation="horizontal" android:id="@id/notificationIcons" android:paddingLeft="0.0dip" android:layout_width="145.0dip" android:layout_height="fill_parent" android:layout_alignParentLeft="true" />
<LinearLayout android:gravity="right|center" android:orientation="horizontal" android:id="@id/statusIcons" android:paddingRight="0.0dip" android:layout_width="110.0dip" android:layout_height="fill_parent" android:layout_weight="1.0" android:layout_alignParentRight="true" />
</LinearLayout>
<LinearLayout android:gravity="center" android:orientation="horizontal" android:id="@id/icons" android:layout_width="fill_parent" android:layout_height="fill_parent">
<com.android.systemui.statusbar.Clock android:textAppearance="@android:style/TextAppearance.StatusBar.Icon" android:textSize="19.0sp" android:typeface="normal" android:textStyle="normal" android:textColor="#ff1ca6f5" android:gravity="center" android:paddingRight="0.0dip" android:layout_width="wrap_content" android:layout_height="fill_parent" android:singleLine="true" />
</LinearLayout>
<LinearLayout android:orientation="horizontal" android:id="@id/ticker" android:background="#ff000000" android:paddingLeft="0.0dip" android:animationCache="false" android:layout_width="fill_parent" android:layout_height="fill_parent">
<ImageSwitcher android:id="@id/tickerIcon" android:layout_width="wrap_content" android:layout_height="fill_parent" android:layout_marginRight="0.0dip">
<com.android.systemui.statusbar.AnimatedImageView android:layout_width="25.0dip" android:layout_height="25.0dip" />
<com.android.systemui.statusbar.AnimatedImageView android:layout_width="25.0dip" android:layout_height="25.0dip" />
</ImageSwitcher>
<com.android.systemui.statusbar.TickerView android:id="@id/tickerText" android:paddingTop="2.0dip" android:paddingRight="0.0dip" android:layout_width="0.0dip" android:layout_height="wrap_content" android:layout_weight="1.0">
<TextView android:textAppearance="@android:style/TextAppearance.StatusBar.Ticker" android:textColor="#ff1ca6f5" android:layout_width="fill_parent" android:layout_height="wrap_content" android:singleLine="true" />
<TextView android:textAppearance="@android:style/TextAppearance.StatusBar.Ticker" android:textColor="#ff1ca6f5" android:layout_width="fill_parent" android:layout_height="wrap_content" android:singleLine="true" />
</com.android.systemui.statusbar.TickerView>
</LinearLayout>
<com.android.systemui.statusbar.DateView android:textAppearance="@android:style/TextAppearance.StatusBar.Icon" android:textSize="19.0sp" android:typeface="normal" android:textStyle="normal" android:textColor="#ff1ca6f5" android:gravity="left|center" android:id="@id/date" android:background="#ff000000" android:paddingLeft="6.0px" android:paddingRight="0.0px" android:layout_width="wrap_content" android:layout_height="fill_parent" android:singleLine="true" />
</com.android.systemui.statusbar.StatusBarView>

or simply change your status_bar.xml (PATH: system/app/SystemUI.apk/res/layout/status_bar.xml) with this attached: