CEO/CTO of Attensity (text analytics)
Toby Segaran (author of O'Reilly's Collective Intelligence)
Mike McCready of Platinum Blue (predicts hit songs algorithmically) or Epagogix (uses neural networks to predict hit movies)
Paul Graham of YCombinator
David Cole of Lunexa, a data-mining consulting firm
Nathan Eagle (MIT Media Lab) or other mobile data mining people
Someone from Predictify (prediction markets)
Someone from NebuAd (better ad targeting)
Jeff Hammerbacher, head of data analytics at Facebook
Tom Bankston of Authenticlick (traffic quality and ROI measurement/click fraud detection)
Someone from Mobio (mobile widgets/mashups) to talk about how mobile apps can help people simplify complex lives
Someone from Mint.com or Cake Financial (personal finance sites)
Engineer from Farecast (airfare prediction and hedging site)
Music discovery (recommendations) - Pandora, Last.fm, or MusicShake
Online reputation and incentives (Yahoo! Answers, Sourceforge, or OpenID) and what can be done with reputation data
Gordon Bell - storing an entire life digitally using devices such as sensecams
Avinash Kaushik, Head Analytics Guru at Google and author of the blog Occam's Razor (www.kaushik.net)
Speaker on unique aspects of mobile apps - e.g., someone from Nokia Research or RIM speaking about benefits and capturable metrics their products offer to data collection apps