During one of the lunches, Microsoft mentioned they had 8K developers for 50M lines of code (LOC) for Windows (6250 lines/man). Brad Jensen, from Sabre's product group, told the table he had 250 developers for 14MLOC (56000 lines/man). Someone else was quick to point out "THATS NOT 10 TIMES!"
I also jotted down a quote, "Practices give accountability to the values. Values bring meaning to the practices" from Kent Beck's keynote: Avarice: The Fifth Value?. Uncle Bob's "Going Meta" talk warned of the evils of going meta, despite how much fun it can be (so keep writing those tests!).
A couple of attendees remarked to me about how XP Universe "feels" different than other conferences, more friendly, more open, more about the attendees than the presenters. That is one of the things I really love about Extreme Programming, the people who get it.