I didn't see anyone saying this yet, so I'll say it: this is an excellent idea. My wife literally (and I do mean literally) has a closet full (in fact, stuffed) with clothes and she constantly complains that she can't wear any of it, that they don't fit her any more, etc. And this is a walk-in closet.

I don't know if she would like this service or not (a lot of it would, like many web apps, come down to how easy it was for her to use) but if she did, man oh man, would you ever have a dedicated customer. And I bet that goes for thousands, if not millions, of other women. Great idea!!!