Hey just thought I'd share these keybindings I came up with while playing on a BT keyboard, but I discovered they work quite well with the N900's keyboard as well:

Pitch/Yaw: IJKL
Roll L/R: U/O
Slide (strafe): WASD
Forward/Reverse: E/Q

Fire primary: Space
Fire Secondary: C
Flare: F
Bomb: B