A couple of links for your weekend reading:
Jen Robinson has an excellent list of Speculative, Science Fiction and Dystopian Fiction for teens. Some of these books were actually published for adults but as Jen notes have definite teen appeal. Do give it a look.
Also, Carlie has an engaging list of "Guy-centric YA Romance" at the Libraries Unlimited quarterly newsletter. I'm never sure if this is a genre that works with guys as much as it does with girls - or even works for guys at all. To some degree I wonder if guy-centric YA is really a slight variation of the genre that is still going to be predominantly read by female readers, just written from a different perspective.
Any thoughts on guys reading romance, I'd love to hear them.