I am just about back to using a Mac full-time as my desktop (but with a Linux test server in my office closet and 2 leased Linux hosted servers). Google's Mac support is greatly appreciated.
Speaking of Mac support, I must admit a bit of hipocracy: I complained to Microsoft this week about their live.com portal not working with Safari and then remembered that I don't (yet) support Safari on my KBdocs.com web portal. Note to self... Anyway, I have been getting into spending real test/try-it-out time on all the major new web portals - I like to see where the big players are going, maybe get some ideas, etc.