Script Summary: Provides arrow to collapse and uncollapse iGoogle sidebar tabs.
This adds a triangle to the left side of the screen that can be used to collapse and uncollapse the tabs sidebar in iGoogle. It saves the state the sidebar, and provides a settings menu where you can define a shortcut key for toggling the sidebar.
This script is based on a similar script for Google Calendar by yooskeh (http://userscripts.org/scripts/review/8507). Thanks yooskeh!
Also check out my iGoogle style for Stylish:
UPDATE: This script stopped working with FF3.5 (it still hides the tabs, but the arrow is missing), and I haven't figured out why yet. There's a stylish script that will hide the tabs: