Scratch notes from PDF:

1. A great vibe and great people. I suggest that PDF is to IPDI as SXSW is to most tech conferences: Beyond the standard kabuki of vendor-pitches and celebrity presentations, there's a smart idealism and subculture that is excellent.

2. An extra mega interesting-looking book, heartily recommended by Noel and Beka: Dream: Re-imagining Politics In The Age Of Fantasy. From the dust jacket: "What do Paris Hilton, Grand Theft Auto, Las Vegas, and a McDonald's commercial have in common with progressive politics? Not much."

3. Aldon showed me a hack to synch his blog with his twitter with his Facebook status, using TwitterFeed.com. Twitter also became an ad-hoc back-channel chatroom when Confabb, the "official" conference web presence, didn't work. Consensus was that Twitter should add some kind of grouping/tagging capability to make networked microblogging more effective. I'm not sure I agree. Hoppin is excited about a new similar service called Jaiku.

4. Also buzzing: Freebase.com, an open repository for structured data. Change.org, which I never caught what exactly it IS, but everyone seemed really excited by it. Bokardo.com looks smart.

5. A good conversation lead by Winer about open hardware/software platforms. Worth investigating: OpenMoko, which claims to be an open mobile platform, and Rockbox which ditto for music.