Follow the above link for the sequel to a movie that seemed to end pretty decisively, but nope, Ginger Snaps II: Unleashed is out this year. Emily Perkins and Katharine Isabelle are back, and this time they're both werewolves. Looks run of the mill from the trailer, but it might have some of the magic of the original. Ginger Snaps Back is the title for the prequel, which follows soon after.
