Developers can also learn more at the Symbian Smartphone Show (free to attend), which takes place next Tuesday and Wednesday, and there will be many more Forum Nokia events, both offline and online throughout the rest of the year.
Tomorrow, the first webinar (9am London) is intended for a technical audience, while the second (11am San Fransisco) offers an introductory overview. The webinars are free to attend, but you do need to register.