TL;DR: You can cash most coins out. BTC-e.com, bter.com, and vircurex.com will convert your alt coins back to BitCoin.
Of these, bter.com would appear to have the most favorable fee structure. The others charge
BTC0.01 to withdraw; bter.com charges only a tenth of that. Bitparking offered the same rates...too bad it shut down.
GPU isn't dead for Scrypt Mining.
Indeed. While waiting for BFL to deliver, I picked up a 6870 off of Bitmit. I've only had it running a month or so, but at
BTC0.7, I think it's already paid for itself.