Of course the big thing on campus right now is Congress, more formally known as the Congress of the Humanities and Social Sciences, which has basically taken over the University for the whole week. I haven't been able to take in too many of the events, but I did manage to get to George Dyson's talk, "The First Five Kilobytes are the Hardest," covering the history of the development of early computing, particularly focussing on the work of von Neumann et. al. at the Princeton Institute for Advanced Study in the 40s and 50s.
For me it was a bit of a review, covering a lot of the same ground as Martin Davis' "Engines of Logic" which I read a few years back. But Dyson's take expanded on the historical source material in ways that really gave a sense of the human side of early computing; surfacing old memos, log books and photographs illustrating the challenges, frustrations, and absurdities of the working lives of the early technologists. Somehow this made the magnitude of their achievement seem even more remarkable.
Hopefully someone will post a video of the talk somewhere, but until then you can get a capsule version from checking out his TED talk from 2008, which covered a lot of the same material. Actually it's worth checking out even if you saw the talk today, since it covers the stuff on Barricelli that he skipped over due to time constraints this afternoon.