When I talk to some people about D-STAR, a concern that often gets raised is that the only manufacturer producing D-STAR kit is ICOM. Though the D-STAR standard is not proprietary to Icom, certainly it could appear that no other manufacturers support it actively.
I was pleased to read that David, G4ULF and the Ashdown Forest Repeater Group have built the first non Icom D-STAR repeater in prototype operation in the UK. The repeater uses one of the GMSK Node Adapters developed by Satoshi Yasuda, 7M3TJZ.
The GB7MH repeater is connected to the G2 network and is being rigorously tested to assure integrity of the network.
Read more at http://g4ulf.blogspot.com