BroadBand HamNet (BBHN)
BroadBand HamNet (BBHN) is a self-configuring mesh network that operates using standard off-the-shelf WiFi devices that have been loaded with custom firmware. Due to higher power output, these devices are operated in Amateur Radio Bands (typically Channel 1 of the 2.4 GHz Band).
I have a total of four nodes that can be deployed. WB4SON-AP1, WB4SON-AP2, and WB4SON-AP3 are based on Linksys WRT54GS router hardware (two version 2.0 and one version 1.0). WB4SON-AP4 is based on a Ubiquity airGripM2HP.
Rhode Island (and SEMA) has a BBHN website: http://bbhn-ri.com/
The best national resource for BBHN information is: http://www.broadband-hamnet.org/
Instructions on installing FW into Linksys devices can be found here: http://www.broadband-hamnet.org/images/stories/hsmmmesh-step-by-step.pdf
Instructions on installing FW into a Ubiquity device can be found here: http://ubnt.hsmm-mesh.org/products/BBHN/wiki/HowTo/FlashUbiquiti
RI Coverage is spotty at the moment, but new nodes should be joining in the Newport and Tiverton area soon. You can check out the latest map at: http://www.broadband-hamnet.org/googlemapped-mesh-nodes.html