Do places like American Samao, Puerto Rico and the US Virgin Islands count? They're the ones I can think of off the top of my head. Dunno if they follow the same rules of Guam.
Nope. Gotta be a state or DC to get votes. They get to vote on whether or not they want to be a state, though! Puerto Rico decides not to be one on a fairly regular basis.
Edit: They're actually voting on that very topic today, I believe!