logitech already controls z-wave devices albeat extremely limited in the 890 and 890pro.
i have asked around about integrating philips via rs232 but haven't heard much in response. the rf for philips is 802.11g, not 900Mhz. crestron went the route of zigbee from what i can see.
worthington distribution did put out a software for the nevo line for z-wave control but it is 1way right now which kind of defeats half the purpose of z-wave, acks.
i have been searching for the holy grail of handheld z-wave_a/v remotes for about a year now and the 890pro is the closest i have found so far.