Linksys's WRV54G has firmware upgrade to allow owners to enable Boingo Hot Spot in a Box service: Boingo presents the latest twist in turnkey hotspots solutions: buy a WRV54G for about $180 to $200, check a box to activate the Boingo feature, and sign up with Boingo. The WRV54G is a regular Ethernet switch and Wi-Fi gateway with the ability to terminate up to 50 static end-to-end VPN sessions (which isn't the same as offering remote VPN server access for roaming clients).
Boingo has made public all of their payment rates, too: $20 bounty for new Boingo customers; $4 share for a daily user; $1 share for a monthly user's session at your location.
I received a version that tipped the hat last October because the firmware release contained the Boingo option already. Since I also purchased a WRV54G just after evaluating one, it's time to upgrade its firmware and try out being a hotspot in my Greenwood neighborhood in which there is practically no hotspot access.