Had it running for 12 hours now, no problems.
I have flashed Drew's latest kernel, and, I too have experienced the SD Card just disappearing. Its not a huge deal, all you have to do is remount it, just wanted to report the bug.
Does the ROM go through the normal "zvh maintenance" after upgrading from ZVD? i have noticed it is a little laggy at times, but 99% of the time it is as fast or faster then kravens or drews cm7 port. again, excellent job to those involved with developing.
If you came straight from zvd, then it would not surprise me if some maintenance is going on in the background at first. It really should not last much more than a day or so.
Glad u enjoy the Rom, going to make some small updates here soon for v1.0. Just a couple fixes, nothing groundbreaking for the new release. This build has proven to be quite stable for the most part.