It was nice hanging around onsite during set up and as people arrived. We had dinner and collected Shwag (including the Solio Universal charger -- Solar charger for lots of devices -- various books and notebooks from O'Reilly, and a stainless steel water bottle that looks designed to get you in trouble at the airport)and admired the Tesla electric car (the fast one) and then had a session of introductions (can you describe your interests in three words, no sentences?), started putting together the session schedule, and mingled and chatted, and chatted some more. I met three other people from Michigan, including one who went to the same elementary school as I did! (albiet much earlier than I).
As far as people I already knew here, I've chatted with Chris DiBona, Brother Guy, Neal Stephenson, and Mike Gaiman; I didn't recognize Mike when I first walked past him, but he called out to me and I recognized his voice immediately. :) I was excited to meet Esther Dyson but didn't really get a chance to chat with her so far.
I was given my first toy pretty early on -- some sun-chargeable glowing "Kryptonite" in a little bottle from Simon Quellen Field, of Kinetic Microscience (Science toys). I also really enjoyed meeting and speaking with Shankar Subramaniam of UCSD, Eleanor Rieffel, who is a mathematician (we got into a great discussion at dinner advising a fellow camper whose 9-year-old daughter is really good at math at what to give her to explore and do), Kevin Grazier, who is a science adviser to various sci-fi TV shows including BSG, and Mike Hendrickson, who is a publisher at O'Rielly.
I think my favorite three-word self summary (and I didn't catch who said it) was "Think, play, repeat." That seems to be what we're planning to do here this weekend.