Thanks for your help Semi!
I've already ordered a pair of the panaflo L1A's, so that should take care of a significant portion of the noise. As for the CPU, its just a stock OEM intel socket 478 fan with the heat sink that came with. I think I'd like to replace with the following Zalman:
http://www.directron.com/cnps5500cu.html
Finally, the power supply is a L&C 350w ATX job. I've looked around on the internet and found that while you can pick on up for about $25, I've seen a few reviews that have said its actually reasonably quiet. So I may just let it alone for the moment. Plus, I've never dealt directly with either the power suply or CPU fan, how hard are they to replace?
Also, thanks for the tip on the Motherboard Monitor, I'll definitely check it out
-Josh
