OpenMesh

WiFi Mesh Network vendor

http://www.open-mesh.com

uses ROBIN in OpenWRT

cheap hub $30 http://www.open-mesh.com/index.php/low-cost-mesh.html - lower power, not "high-reliability", but still has 2 SSID-s, etc.

"professional" hub $60 http://www.open-mesh.com/index.php/professional-mesh.html

http://support.open-mesh.com/activekb/questions/2/Mesh+Network+Planning

Feb'2011: http://www.shareable.net/blog/how-to-set-up-a-open-mesh-network-in-your-neighborhood