K so I figured it all out fine, and just jailbroke my iPod touch 4.2.1 and dl'ed Cydia. Now what? I've got a new theme and that's cool and all, but I thought the whole point to this was to get free app store apps, and I can't find those anywhere.
No, jailbreaking does not equal piracy. (ModMyi will not help with piracy).
Jailbreaking is to allow you to install stuff or do things outside of Apple's app store. Get more from your phone. It gives you choices; not just a single store to buy items.