Chrome gives me back something I missed:  Tabs on top.  I really enjoyed it in the Safari 4.0 beta but they just removed it with no warning in the release version.  I don't get it.

Chrome on OS X looks good and functions very much as the Windows version does.  Though I think the icons could look a little better.  Not that I'm a good graphic designer myself.  

The Ars review points out the lack of Bookmark management (I can deal with) and the lack of Extensions that they just released for Windows.  Now, I'm not a big extension user but I have recently fallen in love with Feedly.  And the Chrome extension, of course, doesn't work.

I'm going to stick Chrome out for a while to see how it is.  I didn't want to like it but I'm a big stickler for tabs on top.

Thunderbird 3.0 gives tab goodness as well.  In Apple Mail, I'm constantly loosing track of open messages if I need to context switch.  Tabs gets rid of that discomfort.  Plus, I don't need to have a message pane anymore.  I'll just double click the message and get a tab.  I think it's better than I imagined.  If the Gmail integration is so much better, as it seems to be, then I can't go wrong.

I'll need to play with Thunderbird 3 for a few more days to see how it goes. I would like threaded emails but I'm sure an Add-On can fix that. Figured out threaded emails.  I'm just a bit slow :)