Yeah, I'm liking it a lot, too.  Biggest problem so far has been TurboTax Online refusing to let me in, despite claiming to support FF 1.2 and up (or something like that).

FireBug and AdBlock Plus seem to be doing okay, and I'm not missing any of my other addons enough to care.  I thought I'd really miss the del.icio.us addon, but it hasn't been as much of a nuisance as I expected... besides, I'm sure it'll get updated relatively soon.

Firefox 3 beta and Safari 3.1 are so much faster than their predecessors they feel like a whole new ballgame. I think this new generation is going to seal web applications' victory over their desktop brethen. 

And I'm starting to understand why Apple ported Safari to Windows - if they can maintain anything close to their current performance lead over IE, they could gain some real marketshare. (the best of the new Safari though is that it's headed for the iPhone too)

For the first time in a long while, browsers are interesting again.