
Sorry dude. Now you know what it's like to be a member of the Green party! Sort of unfortunate from your perspective, but no company really cares about maintaining backwards compatibility beyond 2-3 years average.
New video cards are PCI-E and sometimes later AGP as an (expensive) afterthought, but high-end motherboards didn't all go PCI-E until 2005. Even now, there's still a huge number of AGP systems--but look at how popular PCI video cards were in 2000-2001. They're all but gone now. USB 2.0 became standard on PCs in 2001, most Macs in 2002. There were some holdouts, but now they amount to substantially less than 1% of recent computers. Sadly, you're one of them--but a 2004 vintage iPod, or even early 2005, will last you many years from now, with this computer AND the next. Buy clayj's or check out the refurb/clearance stores.