Just wondering if you guys have ever considered offering a self contained Player vs. Environment version of the game for sale on one of the download sites as 1) a revenue source and 2) a teaser for which buyers would have to subscribe to the online version or even 'advanced' single player versions for access to some of the bigger stuff?

I think they did this to some degree with the Android port. There's a free "demo" mode you can enter and fly around some preset obstacle course sector.

It has no AI. All our AI is server-side, so creating a more fully featured "single player" version would be some work.

Ah ok. I never actually got to play it since it gets out-of-memory killed on my phone :)