best way to send messages to many peers

I am expecting to send a message to a large number of peers (100 to 
1000) approximately once a minute over a unicast pipe.

I would like to avoid creating each pipe and then tearing it down for 
each message-- this doesn't seem very efficient.  Should I maintain an 
OutputPipe for each of these peers, storing them in a data structure so 
I can look them up when I need to deliver a message?  Is there a way I 
can offload this work onto JXTA so my app doesn't have to do this work 
itself?

thanks again,
  -john.