We do service a handful repeaters, and I'm hoping to do a some sort of RF based TCP/IP solution, haven't found one I like yet. Any recommendations? I could go Wifi based, 900/2.4,5ghz, but I'm hoping to find something other then packet to use at 440 or 1.2.

Check out NW Digital Radio's UDRX-440 (56kbps IPv6 on 440 MHz) MichaelN6MEF