Here is the LinkedIn group on Internet strategy:

This group is for anybody who have a strong interest in Internet strategy (Internet business models, Internet marketing, web design, and search engine optimization) or works in an Internet-related organization. Everybody can join —industry players, startup entrepreneurs, managers, software providers, consultants, researchers, analysts, journalists, bloggers, and, of course, marketers.

Here is the LinkedIn group on prediction markets:

This group is for anybody who have a strong interest in prediction markets (and collective forecasting, generally) or works in the prediction market industry. Everybody can join —industry players, startup entrepreneurs, exchange managers, software providers, consultants, researchers, analysts, journalists, bloggers, and, of course, traders.