I actually found the problem after nothing would work anywhere. Couldn't get anything from Rom Manager or the Market. Turns out my SD card was maxed due to all the backups I had made (had no idea they were upwards of 300MB a piece!). Weird though, because I thought anything downloaded from Rom Manager or the Market went to the internal phone storage by default. There's still plenty of space there.
Anyhow, I just erased a couple of unneeded backups and freed up over half a gig on the SD card and all is well again. Guess I'll upgrade to a 16GB card when the cashflow permits. Or maybe I'll ask for it for my birthday, heh (less than a week away).