Wow, this is a great thread. I'd more or less given up on using my X61 for OSX, but following Sammy's instructions for 10.6.3, things are working pretty well. A few questions though:
1) Has anybody managed to get Atheros wireless working with K64? It doesn't seem to load for me.
2) Any suggestions for a battery meter that will work with VoodooPowerMini?
3) There's something a bit peculiar going on with the built-in LCD. Colors seem unusually purple. For a maybe 1/2 a second, the blue OS X background looks correct on booting, and then it turns purplish. Any ideas, or monitor profiles to work around this?

Thanks!