This looks really, really interesting. It also seems like they're thinking a lot about tooling, which I appreciate - there's a lot of stuff out there right now,

This looks really, really interesting. It also seems like they're thinking a lot about tooling, which I appreciate - there's a lot of stuff out there right now, I assume the true differentiator will be in the tooling. On that note, there's a weird "don't go back" loop at https://www.spark.io/signup https://www.spark.io/signup.