Dan is top notch. I had 2 posters backed by him this year and he did an outstanding job. I've been meaning to post some before and after pics.
I've been reading about hits and misses lately - if anyone is in doubt, send it to Dan, period.
Good to hear this guy is legit.
H77, there are several great linen backing videos, blogs, etc. One of the best IMO is from Poster Mountain. A search here will lead you to some threads with links of their work.
Martinc, I also wonder what exactly the "shrink wrapping" entails. I would assume it's simply an acid-free board, with a polyethylene or maybe fancy mylar sleeve, that is sealed around the poster and board.