There's already been some discussion in the ICG forum. The ICG team seems coordinated in terms of development but the forum is a good place for discussion of volunteer work.
The most innovative feature of ICG is the advanced ATM API developed by Hectortilla which is already used in GeneralByte ATMs. It should be easy to get listed on other ATM providers or other companies providing payment solutions as a Web merchant API is also available. There's already a steady stream of merchants accepting ICG according to the twitter feed so that aspect is being taken care of.