still waiting on a mac version, however, i installed this on my PC and am backing up my apps now! i'm very excited about this! this will make my next restore much less painful!
i just found this too... different dev but it seems to do the same thing for mac:
http://ibackup.up.to/
UPDATE: HELP!
my next restore may be sooner than planned! after backing up using ibackup on my pc... i connected my iphone back to my mac (to charge it) and itunes popped up, wanting me to "set up my iphone"! it says it was previously synced to this computer (duh) and wants me to restore from my last backup (which was yesterday). what the heck?? how do i fix this?
another update: i just realized that all my music/videos/ringtones are gone... looks like this "backup" screwed up my phone. great. time to restore.