I get asked for this information, most of which in on the CRM Team Blog site. So I thought I'd copy from a recent e-mail to this post for posterity.
MSDN CRM Dev Center - http://msdn2.microsoft.com/en-us/dynamics/crm/default.aspx
CRM Team Blog - http://blogs.msdn.com/crm
Microsoft Dynamics CRM Forums on MSDN
Microsoft Dynamics CRM Newsgroups
Microsoft Dynamics CRM User Samples
MVP Ronald Lemmen’s CRM Bloggers Worldwide List
Microsoft Bloggers We Read
MVP Blogs We Read
Partner Blogs We Read
Did you see this post at blogs.msdn.com
This info is also available on Microsoft.com and the MSDN CRM Dev. Center. :o)