Streeter intrigues me a lot as well.
Huge wingspan, good leaping ability, good straight line speed. He'll be a good red zone target.
Miami had crap QB's during his time there so I think that his stock suffered because of that, but I'm excited to see what he can do.
Official 40 time was a 4.40, but some guys hand clocked him as low as 4.34. He can move.
One thing you'll notice with Streeter is that he hardly runs any routes except for drags and 9 routes. He definitely is going to need some coaching on his routes. However, one thing he was always very good at Miami was corner fades in the end zone. Joe is going to like having a 6'5" receiver.
http://www.youtube.com/watch?v=p8Bu3538FdY&feature=related