Nothing can substitute for attending the Conference in person. It is an opportunity to interact with the presenters, ask questions, and receive content that is not easily represented on the web. I highly recommend it to anyone and everyone possible.
Passes are on sale now... $10 for a single session, $35 for access to all, or $140 for 5 all-access passes.
Now that I am done with that plug, a limited number of past presentations,
many with video or audio, are hosted at
http://first.wpi.edu/Workshops/index.html
Each year, the Conference staff does work to capture some of the content of the Conference and make it available to teams after the event thanks to the generous donation of Rolls-Royce. However, it is not always possible to capture all presentations. For example, the "Advanced Control System Topics" on Thursday afternoon will be highly interactive in teaching programming techniques... which is nearly impossible to capture given the setup and capabilities at the Conference.