So, Firefox 1.5.0.2 is out, and the guys at Mozilla have made this release available as a Universal Binary for the Mac already (meaning it natively supports Intel processors under OS X). Security fixes are also included, so get it while it's hot.
I was also interested to read that some crazy geeks at Sun have already got Solaris running on the Intel iMac. This shows one of the interesting aspects of the Apple move to Intel - pretty much any O/S that runs on Intel PC's will end up on Mac hardware now, without requiring a different version to be compiled for PPC processors. That means more Linux distributions (some already supported Macs), BSDs, Solaris and of course Windows, as well as OS X.
My take is that this will play a more significant role in the server space - I mean I really like Linux, but I wouldn't run it on a Mac as a desktop O/S when I have OS X. However, it has long been known that OS X is pretty crappy at some multi-threaded operations where concurrency is a concern, and that Linux is much better at this. This is not going to be too much of an issue on a workstation, but on a MySQL database server, it has been shown that OS X is a poor competitor to Linux. Now we won't be tied to a few distros, I wouldn't be at all surprised to see Linux on Mac servers becoming a solid choice in the data centre.