Is there a specific reason you call your build experimental (will there be a stable?) or you just wait for more feedback?
@peetu20: you don't need to format system, because there is a "format system" command in the .zip and it is formatted automatically when you install. But to be on the safe side - fromat it.
About the 3.x kernel, AFAIK there is an experimental version, but it breaks more things, than it fixes. And it's not worthed to replace a hacked kernel with our stable kernel, if I understand correctly.