Oh no Walnut Creek, the humanity of it all! It's a whole half hour on the yellow line to downtown SF.<p>All jokes aside, this is probably pretty smart, although maybe give more involvement to the customer. The first thing anyone does when the hotel tells them its overbooked is take to their smartphone. If a customer can say, "can I stay here instead?" it might help nudge the process along.
Hate to be negative nellie but this strikes me as a very small niche that should almost disappear on its own. Which is fine, just not something I'd expect from YC or venture in general.