No, but in the US we have a big push to 'create' a custom market, which means a few American companies (read B&K, ADA, Niles) do build equipment which can be controlled via RS232. Some higher end Pioneer and Sony are also RS232 controllable. Mostly just TV's and recievers though...the stuff that sticks around for a while.

In my experience RS232 is slightly overrated...by the time I have tracked down a technician at a company who can send me a text document with the RS232 codes i need, and then I decipher the protocol (baud rates, data structure, etc) I could have long since learned an IR code, stuck on an emitter and have been done with it. RS232 is mostly useful where you need some sort of data feedback, such as MP3 ID3 tags, or playlist info, etc. to be displayed on your remote.

RobZ