So here are three (partially) conflicting events you might be interested in:
NetEcon 2015: Highlights include excellent keynote speakers: Rakesh Vohra at 9:00 am, Eva Tardos at 2:00 pm, and R. Srikant at 4:00 pm
The Workshop on Algorithmic Game Theory and Data Science: This workshop is highlighting work in a very exciting area -- the intersection between "data science" and mechanism design -- which is at its very beginning, and I think ripe for lots of important work to be done. Its also attracted a great lineup of speakers (my student Steven will be giving the talk on our paper).
The STOC presentation of our paper, Preserving Statistical Validity in Adaptive Data Analysis: This is at 1:55pm, unfortunately conflicting with NetEcon -- but the attendees of the AGT + Data Science workshop will get a break in order to attend. Vitaly will be giving the talk, which I expect will be very good.
If you want to hear a longer (but probably less good) version of the talk, you can tune in tomorrow at 1pm eastern when I talk about this paper for TCS+
EDIT: The video of the talk is here. It went off with only one technical hitch.