Just a heads up to anyone who's interested: we're starting a new push to finalize the RTP payload formats for Vorbis and Speex and to develop one for Theora. I've created a new mailing list for coordinating development. Feel free to join if you're interested in the design discussions, but we'll also cross-post major drafts to the relevent dev lists for review. Subscription info at http://lists.xiph.org/mailman/listinfo/xiph-rtp or mail xiph-rtp-request@xiph.org. Cheers, -r