Bookmarking.

http://www.livejournal.com/users/conuly/847295.html

http://www.2flashgames.com/f/f-1211.htm

both via porsupah I think.

o.O Multi-button Apple Mouse

http://www.apple.com/mightymouse/

As someone on the MacWarrior's mailing list so aptly put it - Hell has just frozen over.