I picked up the mapping DVD from NOHVCC thats been talked about in a couple of the mags. You can get it here: http://www.nohvcc.org/IMAGES/prgps.asp
It talks about this being done by the US Forest Service. It sounds like this is our big chance to get some trails we want. They siad they will be updating every year.
I only browsed through some of the DVD so far. It sounds like they want the GPS tracks if you can give them to them.
I will update after I finish watching if much different.