Since I'm still stuck in the noob forum until I rack up 2 more hours, I'll post here.

I'm running 2 5830 Xtreme's overclocked to 935Mhz and ghetto rigged some extra fans next to my cards until I get my new case.  My GPU's run 73-75 *C.  Is it a safe temp?  Can I bump up the OC even more?

I'm now running at 580-590 Mh/s with this setup.