All you Mac heads saying PPC is so much faster than x86 have your heads so far up your asses you can lick your appendix. PPC may be a more efficient architecture, Mhz wise, but a high end x86 system will beat the shit out of any Mac in terms of raw power and cost.
Let's see, I could get a 933 mhz "power" mac for over $2500. Of course, I could only buy this from Apple, which maintains complete control over all Mac hardware sales. But, I'd rather just spend $1,400 on a cutting edge PC that delivers better performance. I built my computer from scratch, something you Mac lovers can only dream of doing, and it's as stable as hell (XP hasn't crashed once since I got it) and flies through everything I throw at it. It also lets me customize my computer to the smallest detail, while still keeping the price low. So fine, keep your stupid Macs, and rave about how great your 500 mhz g4 is. While you're doing that, I'll be playing Morrowind in 1280x960 at 50 fps on my geforce 4 ti4600 and multitasking between 3ds Max and Photoshop 7.
As for servers, nothing beats Linux on an x86 computer for most purposes in terms of cost-efficiency. Only a buffoon would waste money on a Mac for a server.
PS My other computer is a 700 mhz athlon and I've had it for over 5 years. It still runs great. So stop your lying horse shit about x86 being "utter, short-lived crap." If you can run any program you want on your old 500 mhz Mac, then good for you, but that shows that Mac software hasn't advanced much in the past 2 years.