If you, like me bought a radioShark, here's a tip to prevent a lot of wasted time-shifting: Do not, under any circumstances, plug the radioShark into your Monitor USB port. If you do and the monitor goes to sleep or into screen-saver mode, radioShark will crash and only a full re-start will fix it. Also, unplugging the radioShark from the Monitor will cause a catastrophic crash. Instead, plug into a hub and it will be hunky-dorry. Griffin also recommends that you don't let your Mac sleep. Poor, tired Mac.