Tech-talk on Scheme tomorrow.
As usual we'll have free pizza at 12pm, and the talk will start at 12:30pm. It'll be broadcast live on the HackerTV channel. If you watch it there live (or come to the office in person!), you'll be able to participate in the Q&A. If you miss the talk you can always catch it in the archives at your convenience.
The talk has a Facebook event page.