Last Saturday or Sunday I updated Rock and attempted to update Cydia. A couple dependencies for the new Cydia downloaded and installed, but Cydia failed due to the failed installation of a dependency that had "iPhone" in its name (I don't remember the exact name). I shut off my iPod, thinking I'd figure out the problem later. When I try to boot, the apple logo comes up for a few seconds, then my iPod shuts off.
By using the home and power button, I am able to get my iPod in either recovery or DFU mode. I found that iRecovery is able to detect it in recovery mode.
They is information on my iPod (what songs I have, etc.) that I do not want to lose. iTunes gives me the option for a restore, but I want to recover this information by accessing the filesystem or by fixing my iPod so that it boots properly.