The best sessions today were Mono-centric. The Mono 1.0 release talk was interesting, hostorically speaking... and the talk about IronPython was well attended. Everybody hissed a bit when the author told us that he was just hired by Microsoft to fix the .NET engine... Im sure they'd rather he work on Mono, but we can't all work for Novell!
The future of Java in the open source community is looking somewhat grim. There was a panel with Eric Raymond and OReilly and a few guys from Apache and Sun... developers are miffed that Sun hasn't made Java more open... but at Java One the developers were miffed that Sun hasn't put the kaibash on forked versions of J2EE. Rock and a hard place, it seems.
The XML talks I attended were fairly good - PHP has some really nice SOAP hooks in PEAR::SOAP, Python hooks are not as good, and Jabber looks like its trying to replace the verbose SOAP altogether. It is a lot more powerful, and easier to secure and use... but people love their SOAP because it goes over HTTP, dont they?