Some folks from "The Hub", along with Ross Bencina of "AudioMulch" fame, have been working on an OSC system for collaborative performances involving a server-app which handles the routing for you. IP addresses are replaced with simple IDs, and it looks fairly plug-and-play. Unfortunately, besides some undocumented PD patches for using this system, that's all I can share with you.
-See: http://www.audiomulch.com/~rossb/code/oscgroups/
AvS
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` |Schreck Ensemble . . . . . . . . . . . . . . . . . . . . +
`  |# -laboratory for live electro-acoustic music- #            |
   |             http://www.schreck.nl/                         |
   |             http://www.xs4all.nl/~schreck/                 |
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 ` |Compositions http://www.xs4all.nl/~schreck/html/compo.html  |
 ` |Samples      http://www.xs4all.nl/~schreck/html/samp.html   |
 ` |Patches      http://www.xs4all.nl/~schreck/html/pat.html    |
 ` |Videos       http://www.xs4all.nl/~schreck/html/video.html  |
 ` |Scores       http://www.xs4all.nl/~schreck/html/scores.html |
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