I really do love the idea behind these kinds of services - SMS from a desktop browser window? Awesome.

But I really don't want to pass all of my personal traffic off to a rndom new startup's server. How can you convince people to use this and trust you? Does this kind of thing rely on the serial over sharers to just connect their Google account up, and willingly pass off their private messaging?

Maybe I'm being overly critical, but this is precisely the kind of thing I would want to run myself, not give to someone else to run.

edit It seems I jumped the gun a little - their FAQ says that they explicitly don't store the messages on their servers, making them a dumb pipe to just send data. Still, my instinct is to wonder who else can see my messages :/