What with the penguin?

Plancast

Plancast is a social network designed to help people discover upcoming events and the people who plan to attend them.

Launched in December 2009, it has become the primary way that members of the technology community hear about socially relevant conferences, meetups and parties.

Features include deep integration with Facebook, Twitter, Meetup and Eventbrite, event browsing by category and location, and an intuitive plan-sharing interface.