Here's a quick (really, REALLY quick) and dirty breakdown of the the 3:
OKW - Peace and Quiet, LARGE rooms, home-like feel, on golf course, can park outside your door, easy access to Downtown Disney.
VWL - Peace and Quiet, smaller rooms (same as BWV), more hotel-like feel, excellent theming in Pacific Northwest/Disney style, borders forest and lake, easy access to Magic Kingdom.
BWV - Center of the action, more hotel-like feel, easy access to both EPCOT and MGM and LOTS of stuff on/near the Boardwalk, smaller rooms (same as VWL). Currently hardest resort to book, most in demand.
I'm sure that I left LOTS of stuff out, was just trying to summarize differences if you only had a few lines to describe each. What would you guys add/take away from the descriptions? Do you think they're fair? If I wind up getting flamed too much, I'll probably just erase the post...
Also, sgtpet, all three are supposed to be really fantastic, each in their own way. You will hear people talking up their own home resort, of course, but other than OKW people complaining about the size of the other resorts' rooms

, I've hardly heard anyone complain significantly about any of the 3.