Are you talking about grid networking for wide or metropolitan area networks?
What specifically did you want to know? You mentioned software, but first let me ask you what your application is. Are you trying to do this over a WAN or MAN?
I do the network transport design for these, SONET, GigaMan, gigabit ethernet, etc...
Try these links for a bit of background info and also let me know what it is you are trying to accomplish. I will see what else I can scrounge up for you.