GooglePlusPlus Hide Sidebars
googleplusplus_hide_sidebars is a user script for Google Plus (aka Google+ aka G+) that adds a feature to hide/show left and right side bars, and makes the main content wider. This feature is sticky and will show either a Hide Sidebars link or Show Sidebars link.
So far, this userscript was tested in Google Chrome 12 and Firefox 5 (Greasemonkey required) (on OS X).
Feedback is welcome.