I have never actually seen Wally play in person. I almost went to Hudson with Monter tonight to watch, but it didn't work out. I know two pretty reliable people who think Ellenson is good enough to play in the Big 10.
I have heard that UW would be in good position in Wally's recruitment if they were to offer, but they only have one more spot available and that will be saved for JP Tokoto until he decides. Ellenson is not the athlete on the wing that Tokoto is, but he could fill a need for UW if Tokoto decides to go elsewhere. I would guess that the UW staff will stay in contact with Wally in the coming months, in case they eventually need to make a more serious push to land him.