I like Cam. I have him in a fantasy draft franchise. You could always try to develop Pryor. Basically the same breed of QB - just much more raw of a talent.
Or maybe try to rejuvenate Vince Young. See if he can get his head on straight and develop before it's too late age-wise. Maybe go your "take a crap QB and suffer for a year" route and go with Young and Pryor and let them battle in the preseason. Or take Pryor and someone like Tavaris Jackson as #2. Or you could always get Brad Smith
He's listed as a QB I believe.
Devine is a pretty good choice, just be careful if you need him to stay in protection or run routes...his AWR is...bad. I mean Lindsay Lohan bad, but you can't deny his raw physical ability.
Jamaal Charles is a good fast guy (though you probably would have to take him kind of high and don't know if you could get both him and Blount or Hillis). Likewise with McFadden (he might be the best speed guy - and he even has a wrinkle in this game, right Gus?) Demarco Murray has Offensive Playmaker and good speed. Jacquizz Rodgers always seems to "play faster" than his SPD indicates. He also has Offensive Playmaker.
You could always try to get a speed back like Charles early, then grab up Mark Ingram. Ingram has crazy BCV already (95, I think) and is more of a power back. Nice CAR rating as well. He won't fumble on those tough inside runs in obvious run situations. Nothing says you can't start Ingram over Charles if you went that route or rotate at your pleasure. Could try an athletic FB as well and convert him to HB. Marecic seems like a good developmental candidate for something like that. Earnest Graham is a pretty good runner if you want a vet.
Off-hand, I can't think of any more developmental fast guys that are worth taking and you could get later/almost-at-your-leisure in the draft. I probably have some, but need to check my franchises.