Hello Guys,   this is my first post...  
I am on the Synergy Moon X prize team, and have a number of other space/microwave projects...

Here is an interesting cheap Audio/digital/RF Mesh network device:

http://villagetelco.org/mesh-potato/
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Best,   Pat Barthelow 
apolloeme@gmail.com

Google Lunar X prize Team, SYNERGY MOON  
wwww.synergymoon.com 
pat.barthelow@synergymoon.com