This is a little tricky, as Pentax has two mirrorless cameras, the Q and the K-01, and they use different mounts. The K-01 uses a standard K mount, and there are tons of lenses available for that mount. I'm only going to report lenses here that are announced for the K-01 specifically. I'll also be reporting lenses for the Q mount, as well.
Q lens roadmap: wide, telephoto macro, and body cap lenses planned for 2013.