I hate to be the one to tell you, but it looks like you were hit by the "Encryption Unsuccessful" bug that sometimes happens with ICS roms. Hopefully you didn't have anything on your phone's internal SD that you didn't have backed up somewhere else, because it's very possible that you will no longer have access to it.
You may have a small chance if you try flashing back with a stock rom from Odin or Heimdall, but it's a small chance. There's a sticky in the Development section with stock roms, or you can look at the one in my signature (assuming you already have Gingerbread bootloaders).
Take a look at the "Encryption Unsuccessful" thread in the Development section for things that you can do at this point.