You should probably try posting in the Aftermarket Software section. Viigo is the only free podcast application I've heard about (does it stream or download, not sure), and only two paid apps when I was looking so there isn't a big selection.

Might try some of the radio applications or just downloading to your PC and syncing the mp3 files with your BB storage/sd memory. If you're a frequent podcast user, dropping a sawbuck on podtrapper is probably the best way to go. In frequent, I'd probably try syncing the files as I listen to mine on the subway.

Regards-Michael G.