How many of the naive are going to be able to deal with having to manage the burden of 2 APs? Channel management can be a bitch. Personally, I just run FreeSwan from my wirelessly connected laptops to my firewall. It was a real pain encapsulating my wife's Cisco VPN, but it now works. I even use FreeSwan remotely. Just connect to my internal box via FreeSwan and SSH and run my browser and email remotely. But that's not for the naive.
This is a solution looking for a problem. It does nothing to deal with those connected via 100baseT.