OK. Usually I'm in here listing freeware (because, I like free stuff.
), but this is really amazing. If anyone else has seen this, or something like it, and haven't told the rest of us about it, well shame on you!!!
It's called UVLayout.
http://www.uvlayout.com/index.php?option=com_wrapper&Itemid=38 Check out the vids for it. I've tried different UV mappers that claim to be automated, but this one really requires the least effort of any that I've seen, and I really struggle with UV mapping.
It's currently in public beta (and has been for a couple of years now) and the licensing is free, for now. Anyhow, check it out. Also, let me know if I've just missed the boat and there are other UV mappers out there that'll do what this one will.
P.S. I had to right click/save as on the videos. In case they won't stream for you either.
P.S.S.
Here's a pic of a model I mapped with it. Besides very little stretching it's really easy to place your seams where you want them and the pixel density is extremely uniform.