I've been wondering the same about Namor. I've been missing him ever since his title got cancelled (again!)
So far i haven't seen anything wrong with Namor. I think his only appeared in New Avengers #1 so far, and he will be appearing in future issues as well. Maybe being half Atlantean saved him from having his powers messed up.
Is there any news on Namor at all? All I know is he is underwater.