humm, never thought of that before, but Yeah, Justin Long does sorta look the part, would be interesting to see him play something other than comic relief...They could go with padding, but a couple months of weight training would do him some good...though I like the idea of Spidey being someone that LOOKS small but is, in fact very strong.
and Lohan shouldn't even be in a film playing at the same time a Spidey movie is out.
I think Erica Durance (Lois of Smallville) would have an interesting look as MJ, but I've only seen one episode of Smallville with her in it, so I haven't a clue as to what she would actually be like in it. I'd be happy to keep Raimi and the current cast, Though I still think Dunst should have been Gwen and they should have killed her at the end of the first film...
If everyone is done after number 3 I vote they just leave it for about 6 years and then adapt Ultimate Spider-Man for the screen (it would be like a Batman Begins style reboot, and different enough to not trample over the wonderful work that Raimi and co have already done.)