Wireless DATA Link

Gepeto_42 writes "Somebody asked me to help him find a way to get a data link from the coast to a little island where he's gonna have his business (I can't give too much details, it's still secret). The island is at about 10kms from the coast. Is there something else than HAM that could work? Micro-wave? It's in Quebec, Canada, by the way." Probably the best solution would be the 802.11 wireless LAN cards with a souped-up antenna - I'm pretty sure that people have made these work farther than 10km.