What are the best resources for SharePoint 2010 development? Please do one answer per answer.
Let's start with community site: SharePoint Dev Wiki v2010.
You're on it!
A little tongue in cheek perhaps. But you cannot beat a direct answer to a direct question. Plus if people don't know they might be able to point you in the right direction.
I'd say the MSDN SharePoint Developer Center. Documentation is already almost in parity with the documentation of previous versions.
I've ploughed through all the session videos from SharePoint Conference. Alot of gems hidden away there! http://www.mssharepointconference.com
I would say Google or Bing! Since there are so many people blogging about so many different topics, and often the information I'm looking for is not part of the standard documentation, I think the web in general, all tied together with a good search engine makes the best resource!!
I have written a range of blog posts about moving a WSPBuilder solution from SharePoint 2007 to 2010.
Quite insightful if you have experience with SharePoint 2007 development.
MSDN Getting started ressource