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:
http://userstyles.org/styles/8305