To add to what Jason said, I own 5g.com and would likewise entertain similar ideas/participation -- and would combine with other opportunities/partners for the right group: steve at radwebtech.com
I wonder if that name has some serious potential marketing for Sprint/AT&T/Verizon or whatever when their networks advance further. Already Sprint pushes "4G", and while it may be meaningless (or at least poorly representative), they might still be interested in that particular domain?