5850 @ 940/340 – Temp 68-72°C
6870 @ 940/340 – Temp 72-76°C (the bottom card is about 58°C though)

edit: as seen here > http://btcbase.com/2011/07/08/btcbase-mining-stats/
more pics here > http://btcbase.com/2011/07/06/btcbase-mining-rack/

got a good airflow in that room, it was already used as my office server-housing (might post some pics of the cooling-system on my blog during this week)

greetings, btcbase dalson