I have recently implemented UDP control of GrainWave using the Open
Sound Control (OSC) kit from CNMAT.  We are still getting a few bugs
out, but the system is able to provide quite solid performance, even
over a 33.6 modem line.  OSC has a timing system in it, so everything is
timetagged so that it can be played on schedule.  We are presently
simply encapsulating MIDI messages inside OSC packets, but the facility
is there to expand to other protocols.  OSC is platform independant -
all you need to do is add a UDP receiver and sender.  You can get info
and the SDK at:

 http://cnmat.CNMAT.Berkeley.EDU/OSC


-- 
Mike Berry
mikeb@nmol.com
http://www.nmol.com/users/mikeb