We're going to put this under rumor for now, though certainly plausible.

Kevin Marshall for Clarity Consulting, a group very familiar with Windows Phone (hint: the Facebook app), has posted an image via his Twitter account showing what looks like a Google+ app for Windows Phone. The hashtag is #wp7, the phone is an HTC Trophy and it clearly says Google+.

Of course with no other info, it's hard to tell if it's real or not--after all, it's not hard to put an image on the phone and call it an app. Still, Marshall doesn't seem the type to fib on the internet either. So...interesting.

Source: Twitter (@ksmarshall); via Mobility Digest