Thanks for the suggestions and advice.
A few things that were brought up.....
When we spoke to him about playing and recording the show, he did offer to do a seated performance on stage, but we discounted that idea, as part of the appeal of this guy is his interaction with an audience.
I also considered, micing him directly, but figured that it would be hard to get the guitar/vocal mix right.
Didn't consider following him around, although I did think of going dead center in the room where I could direct the mics in his general direction as he moved, although given some of the results when I have been bumped around while wearing my mics, I would suspect that the noise from the movement would be very noticable in the mix.
One thing that was suggested was to mic the guitar on one channel and the vocal on the other, then do some fiddling in post to split the L/R channels and create a "fake" stereo mix. Not really sure whether this is at all possible as my post skills are even worse than my taping
Thanks for the PM Chris, will get back to you on that when payday comes around.
Thanks again to all for the suggestions.
Dave.