This could be quite a game changer. Other than the generous free allowance, the other big difference compared to Heroku is that it allows you to select the infrastructure you launch on, including three different global regions for AWS (Singapore, Ireland, Virginia).
By providing an alternative for Heroku's high prices and the "region-lock" (latency is always a big issue for potential customers), AppFog seems set to be a strong competitor. More competitors in these spaces are always welcome! =]
They might indeed do that. We'll see. Meanwhile, AppFog will be up and running on dozens of data centers by the end of 2012. Those currently available are just the beginning.
By providing an alternative for Heroku's high prices and the "region-lock" (latency is always a big issue for potential customers), AppFog seems set to be a strong competitor. More competitors in these spaces are always welcome! =]