[wolfrom]

Windsoc uses App Engine for our Unified Social API, and while it has many benefits, we've always had our minds on how to move off of it someday. SSL is a big issue for us, and another is the support model (which should be changing soon from what I've seen).

So what we have now is a product that runs both on App Engine and on DotCloud. Since DotCloud is awesome, too, and we know that we can talk to a specific person when something goes wrong, it's currently a front-runner for us. We're also looking at Joyent, too, as opposed to EC2.

But even if we switch large parts of our product to somewhere else, I wouldn't be surprised if we still used App Engine for some things.