Whenever I see websites like this, I always ask myself questions like "How much does it cost?" and "How does it make money?" and "Who's running this site?".
The fact that none of this information is shown scares the heck out of me. It's a shame - I like the concept.
Yeah, I should make that more clear. We built it for the Techcrunch Disrupt hackathon (and won a free trip to Paris as a result). It's on Heroku and I pay about $40/mo to keep the site up and running for people to use for free. SMS is currently disabled to keep costs low.
The fact that none of this information is shown scares the heck out of me. It's a shame - I like the concept.