Libsyn appears to have changed some of their internal workings and redirects and such, and it's broken the Dave's Lounge Shop. It's also broken the header images.
I may not be able to fix this until tonight. Sit tight, everyone.
Update (5:45 PM): It looks like the fix is out of my hands. Libsyn is doing all the redirecting, so the problem is on their end. I've put in a support ticket for this, but it may take some time before it's resolved…
Update (8:00 PM): Looks like everything is working again. Feel free to go buy CDs to your heart's content.