[dustincoates]

A friend and I built a similar service (also at the Yo hackathon) and what you mention is similar to the way we handled it. I don't think it's been publicly announced, but Yo can now receive links on iOS.

The service we built (http://yosesame.com) works by having you Yo YOSESAME, which signs you up if you aren't already and responds with a URL that logs you in right way. The way Yoauth approached it is interesting, but you're right it's a bit strange to have to receive a Yo.