Keith R.A. DeCandido, author of Supernatural: Bone Key and Supernatural: Nevermore, will be attending WonderCon 2009, and will mostly be at the BOOM! booth.
Other Supernatural-related events at WonderCon 2009 are Watchmen panel (February 28, 11:30-12:30); Terminator Salvation panel (February 28, 4:30-5:30); and Harper's Island panel (March 1, 2:45-4:00. Katie Cassidy is scheduled to attend).