You guys have some innovative setups that I've never seen before. Mine is more on the "plain and simple" side.
Prolimatech Megahalems FTW.
http://img44.imageshack.us/img44/3759/img2612z.jpg
By boredgunner, shot with Canon PowerShot A590 IS at 2009-06-11
http://img19.imageshack.us/img19/9129/img2613r.jpg
By boredgunner, shot with Canon PowerShot A590 IS at 2009-06-11
http://img31.imageshack.us/img31/5182/img2614.jpg
By boredgunner, shot with Canon PowerShot A590 IS at 2009-06-11
http://img13.imageshack.us/img13/4171/img2619pke.jpg
By boredgunner, shot with Canon PowerShot A590 IS at 2009-06-11
http://img32.imageshack.us/img32/8290/img2623x.jpg
By boredgunner, shot with Canon PowerShot A590 IS at 2009-06-11
CPU idle temps are 33-37 degrees Celsius, max load temps in Prime95 are 46-49 degrees Celsius. I'm using two Scythe Slipstream 120mm x 25mm fans on it, each are rated at 1900 RPM/110 CFM. I use OCZ Freeze thermal paste. I put a BB sized drop on the center of the CPU and then I put the cooler directly on top of it (best method). I have the COOLER MASTER ATCS 840 case with 10 fans. There are 11 in this pic, but that fan right in front of the video card is now right below the identical one in the 5.25" bay. Those dark blue LED fans are the COOLER MASTER R4 series fans, 2000 RPM/90 CFM. They're more quiet than my Scythe Slipstream fans, and way more quiet than my old Antec TriCool fans (2000 RPM/79 CFM). They push much more air and spin faster according to my fan controller. According to my fan controller, the Antec's spun at 1850-1900 RPM max. These spin at 1900-1950 RPM.
http://img268.imageshack.us/img268/7775/img2280m.jpg
By boredgunner, shot with Canon PowerShot A590 IS at 2009-06-05
The fans. I have three with blue LEDs (two visible in the pic above, and one on the rear) and two with no LEDs (one in my Scythe Kama Bay using a fan grill, the other in the external air duct).
http://img40.imageshack.us/img40/2847/img2131k.jpg
By boredgunner, shot with Canon PowerShot A590 IS at 2009-06-04
I disabled the 230mm top exhaust fan closest to the drive bays. It drew air out of the case prematurely and added to the negative air pressure. I tried making it an intake and it didn't help.
http://img32.imageshack.us/img32/1955/img1823q.jpg
By boredgunner, shot with Canon PowerShot A590 IS at 2009-05-23
CPU Idle Temps: 33-37 degrees Celsius
CPU Load Temps (Prime95): 46-49 degrees Celsius
CPU Load Temps (OCCT Linpack): 56-59 degrees Celsius
GPU Idle Temps: 47-48 degrees Celsius (GTX 260), 42-45 degrees Celsius (9800GT)
GPU Load Temps (260 only, can't stress the 9800GT because it is a PPU): 67 degrees Celsius (ATItool)
GPU Load Temps (260 only, can't stress the 9800GT because it is a PPU): 73 degrees Celsius (Furmark)
GPU Load Temps (260 only, can't stress the 9800GT because it is a PPU): 81 degrees Celsius (OCCT GPU Test)
HDD Temps: 34 degrees Celsius max
☢