The Adobe leaks list is mostly made up of verified emails, so...
Coming to think of it, there has been some spam lately (though that hasn't happened in years now at gmail), and I wonder whether it's related to that Adobe leak.
On a risk / reward basis the benefit to checking here is actually pretty high.
I don't find any of several accounts I use on there, but did find a friend's email listed (and just notified him). I'd actually appreciate a way to query my mailing list in an automated fashion.