http://theplanedoctor.com/images.php
(Scroll down to Duo Deuce)
It appears to be an RV-8 fuselage (not -8A; note the gear towers in the forward cockpit), Twin Comanche engine nacelles and cowlings, RV8A nose gear and mount, and some sort of fastback mod and side-hinge canopy. I can't tell what main gear they're using, but it looks similar to PA-28 kit.
All in all, a pretty ambitious project; I'm surprised we haven't heard about it earlier.
This is similar in many respects to the Twin JAG discussed earlier, but probably comes with enough power to guarantee a reasonable single-engine service ceiling.
Thanks, Bob K.