Great script! Yes, the toggle button would be better placed elsewhere. Also, a simple keyboard shortcut would be nice. Google Reader does this using just "u"

Oops! Disregard my last comment.

Great script! Would be nice to add a keyboard shortcut to toggle. Google Reader does this using just "u".

Google incorporated the idea! So it's no longer useful.

Too bad it's not working for me. The other, similar script does.

Pls update the script per Eric's comment. I spend 20 minutes debugging it myself before reading that just now.

If you want a few more links, check out this script: http://userscripts.org/scripts/show/6664

Hey, I did the exact same scripts, but with fewer links:
http://userscripts.org/scripts/show/5636

Love it, but no longer works for me :( Fx 1.5.01, Greasemonkey 0.6.4