I got my Accelero S1 yesterday and placed it onto my 8800GT including a couple of 120mm fans in push (much like redrumy3's setup). $@&% what a difference in temps compared to stock! My idle temps dropped down to the low-mid 30s, and my folding@home GPU2 load temps dropped to the low-mid 40s celsius with clocks at
756/1890/900. It takes up four slots, but it's well worth it. I'll try to get a picture up today.
Thanks for the ideas redrumy3.