Stick,
I like it a lot! Very innovative. I have a couple of suggestions though. If you give the outboard wing sections some dehidral, it would help correct some of the anhidral instability problems that the inboard sections will cause. It will also give a bit more wing tip clearance for landings, and it will look cool too to boot.

If you are going to have a controlable rudder, I would suggest rudder actuation like Rutan Verieze's use. Verieze's rudders only deflect outward. This means that when left rudder input is given, the left rudder deflects out while the right rudder stays straight. The effect is like a combination of regular rudder functioning and "drag rudder" functioning. The single outward deflecting rudder creates yaw with both drag forces and side-lift forces. This type of rudder actuation is most helpful for yaw control on any aircraft were its dual rudders are further from the centerline than they are aft of the C.G. If you have a computer radio, it should be possible to mix this type of rudder actuation by using a separate servo on each rudder. If not, I'm sure there is a way to get the same rudder functioning with a single servo and some clever mechanical linkages.

As Ollie pointed out, if you use the inboard main wing control surfaces as aileron, your roll authority will be somwhat lacking. To remedy this. I would suggest using the elevators as elevons. The elevons are further away from the aircraft's centerline than the main wing's ailerons and will be able to produce stronger rolling forces. I would then use the main wing control surfaces as flapperons or just plain ailerons. Oh, and use a little washout on the wingtips to avoid tip stall problems.