The other point is that, for 3D specifically, us Mac users have been utterly trounced by PC boxes for quite a while now. The G5s and more current interations of software like Maya start to bridge the gap and really make the G5 a viable machine.
For example, for 90% of even the mid to high end 3D crowd, a dual G5 with the current best Mac video card would more than suffice. Now, for rendering, every extra second can make a difference, so for some shops it's important to shave off ten seconds here and there. For that, the PC/Linux boxes are faster so far. I can't blame them.
I'm just glad that I, as a small shop with minimal 3D needs, can be extremely productive on my Macs. As I grow in 3D, presumably the software and hardware will be in line with my needs. I am optimistic. As it is, Maya runs very well on my lowly Dual g4 1 ghz.
The author of one of the premier guides for MEL scripting (Mark Wilkins) is a Mac guy and he has stated in forums that he now believes Maya on the Mac is an excellent choice unless you absolutely need the fastest possible rendering performance.
Bob Gundu of Alias is a Mac guy and he runs and edits his Maya tutorials on Macs. Some of Gnomon Workshop tutorial DVDs are done running Maya on Macs. The Mac is definitely in the mix these days for 3D. Look at how many seats of Maya are sold for Macs. The Mac is no longer an "also ran" in 3D and it's about dang time. It's a very exciting time to be a Mac user. Things are very good now and can only get even better.
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As for Luxology and Lightwave, I do not know their history other than to point out that indeed the entire staff on the Luxology site is listed as former Lightwave employees. I searched Newtek's site and found no mention of Modo or Luxology. They really need a free demo of Modo if they want it to take off, though.