As posted previously, the team at The Behemoth have established a blog and are letting out tidbits of knowledge to their fans. Their newest bit of information: Castle Crashers will have twenty-two unlockable characters. Straight from the horse's mouth:

We currently have about 22 unlockable characters in Castle Crashers. Throughout the game you will have the opportunity to add these characters to your arsenal by various different means (was that vague enough).

The dev team promises to reveal more unlockable characters as the game comes closer to launch.

That's just awesome. I'm waiting patiently for this game. From what I saw last august, it's going to be a hell of an awesome title.