IMHO, for just doing a peer to peer setup wireless uart, Bitcloud is a bit overkill, µracoli does the same with less effort and it is licensed with a 3 clause BSD license, so it is open source and there is no hassle with any NDA stuff.
What is the max data rate on atmega128rfa1 with peer to peer on µracoli?
And what is involved in setting it up? Can it hop over a repeater?
Sorry for so many questions, but they would be helpful answers as most people on this site tend to recommend x-bee due to it's simplicity, and I can't see any reason that the same cant be done on ATMEGA128RFA1.
What would be really nice is a cross between Serialnet and peer to peer, this would allow the simplicity of Serialnet setup with a transparent usart link over multiple hops