Hehe, I got mine with a $12 Coolermaster HSF for free - huge it was too, albeit aluminium instead of copper, but for a freebie what can you expect?! ;o)
Mine runs like 42-48C with that cooler, and 4 case fans, so not worth me buying another HSF to drop a couple of degrees. Although I recommend a Volcano 7+
if you don't mind the noise too much - my Tbird 1.4@1.6 gets lower temps than the XP2000+ even at the quieter 5000rpm.
Sunnyvale, CA Fry's had the $89 2400+ combo on Monday when I was there, plenty of stock too.
I got USB1.1 and 2.0 working fine with XP Pro SP1a - you need the manual to figure out the pin assignments on the headers for the front USB ports, or just use the rear ones.
USB2.0 will need drivers from the CD. I have often heard that USB doesn't work too well with 2K/98 on this board.... I think they're enabled by default in the BIOS though.