Here's my rig:

AMD Barton 2500
Abit NF7-S (HSF on the northbridge)
2x 256 MB Corsair Low Latency (2-3-2-6) DDR400, even had heatspreaders included!
Some loud-qss Vantec CPU HSF, 5500 RPM, copper HS
Antec SLK3700BLK case, a Solution series case with a 350W PS and a 120mm rear fan
FX 5200 AGP 8x 128MB DirectX9 card, with a HSF for cooling (budget casualty, along with the monitor, but not too shabby)

So, it sounds like I am sitting next to a small hairdryer, ESPECIALLY the CPU fan! But, at right now (been emailing for 45 minutes since I got home) I am running at 31 degC CPU and 21 degC case. After running Prime95 for 6 hours, I peaked out at 48 degC CPU and high 30s case. I'd say there is room to grow as far as heat generation goes. I have it up off the ground, and it moves some serious air through the front vent.

I didn't plan on overclocking right away, and I'm not going to for a bit - at least until after May 3 (my last grad school final). I have the RAM running at 400 MHz DDR, even though the CPU is at 333 FSB. I'm going to run Memtest86 tonight. I know once I go to overclock, I have to bring the RAM back to FSB speeds, but this thing is lightning fast as is for stock settings.

So, what do y'all think? Anyone have some PCs that are as modded as your car?