There's been a little discussion here lately about IRDA and such.

     Has anyone attemped 30-40K Baud communication at 500 feet???? I'm
     considering a wireless front end for my 16C63 MIDI light dimmer.
     http://www.mindspring.com/~jlittle/picstuff.html

     I would like to have a box with a MIDI in cable, a PIC for data encoding,
     and a few IR transmitters at the ends of a few 10 foot cables.  Then you
     just point a transmitter in the general direction of the dimmer packs.
     Point two transmitters if it's a long distance.

     I can get 2400 baud at 150 feet, using Television style remote control
     receivers and a couple of 25mW emitters.  I'm considering on/off keying
     with a 455KHz carrier so I can use common crystal filters in the receivers.
     Comments anyone?

     Joe
     Atlanta Ga. USA