Google’s posted a FAQ for Summer of Code in 2010, which includes a timeline. There’s also a 2010 calendar, which is perhaps most useful in “Agenda” view. Keep those dates in mind if you are planning to participate. If you feel like doing some promotion, there’s a section with flyers in multiple languages.
Also, the GSOC 2010 logo. Logo’s pretty, but typographically, it’s brutal. More importantly, the student stipend has increased to USD $5,000 for 2010.