Are those four devices (I think it's four) just the only ones "officially" supported, or are they really the only ones for which 2-way serial communication is available? In other words, has anybody tried 2-way with any non-listed components to see if they might work?

It sure would be nice to use that little IF macro that stares at me every time I'm in NSP! Any thoughts on when the Nevos will truly support 2-way communication? Four relatively obscure "select 3rd party devices" doesn't really cut it.... :(