Convenience or slippery slope... or something else?

A friend brought this to my attention: http://ipq.co/ He saw it at http://news.ycombinator.com/item?id=1678324 I'm not sure whether to shriek in joy or in pain. Will data from this service - if it is a worthy service - propagate properly? Play nicely with or break other people's toys? Is it a gimmick? Reese