Haven't seen one yet. There was a discussion about turning the curse into a 4e disease track. I want to convert Sean Reynolds 'Curse of the Moon', as it is IMO the best 3x lycanthrope rules but haven't had the time to get a solid understanding of the 4e ruleset yet. I think it would be a simple port...
I should probably set aside a day or so to really dig into the rules .. preferably before my first 4e game next saturday {yes I know.. thats pretty sad, two months after buying the core books and still haven't had time to play.. thats my life! }