Yes, Padmapper does this general kind of thing but it doesn't offer the ability to limit a search based on commute times (which is the title of the post.)

It doesn't filter by them, but it does overlay boundaries for commute time (open filters, then Super Secret Advanced Features).

I definitely need to add public transit, though.

I was corrected in another post and neglected to update this one. I just couldn't see the options for some reason (perhaps because they were super secret :)).

Haha yeah, maybe I should make them less of a secret via a redesign.

Padmapper does it, but not that well. The user interface was miserable for a long time, now it's just bad.

Would love some feedback :-) padmapper at gmail if you have the time.