"…the fact that so many had checked-in on day one of the service is impressive. Thatâ€™s the power of Facebookâ€™s social graph. Itâ€™s a graph that none of the current location players can touch even if you added all of their users together and multiplied them by twenty. Facebook is going to bring location to the mainstream by virtue of their size alone."
A look at back at the early reactions to Google Wave