It might be a little rough around the edges, but I'm limited only by whatever media I have stored on my FTP server, SD Card or USB drive. Being able to view videos from Youtube and listen to Shoutcast streams is pretty nice as well.

http://www.wiimc.org/

Sure, you need to install the Homebrew Channel first, but that's easy enough.

Incorrect. All one needs to do is change the angle of the text label to create a vertical tab. You could also create up-side-down tabs, or diagonal tabs, if you preferred.