I'd also see a problem with a monkey (et al) head being used because there's a fuckton more neural paths to synch up. A bug? Not so many.
Plus, a insect brain doesn't have a cerebrum (they can't think, only react in "preprogramed" ways) and very limited memory. So, insect brains are in many ways analagous to computers in their neural pathway simplicity. Its all feedback loops, stimulus ----> brain ---->response. There is another difficulty though, you've got the brain (ie ganglia) scattered throughout the body, and not just localized in the head. Thats why I want to see how they hooked this up, to which particular neural pathways.