The best place to Subscribe to SharePoint team blog at http://blogs.msdn.com/sharepoint This blog has posts written by Program Managers on specific aspects of WSS V3 and SharePoint Server 2007. Hint – Use Outlook 2007 to subscribe to the RSS feeds.
I would encourage you to join the SharePoint community in Bay Area SharePoint at http://nbaysps.sharepointsite.com/default.aspx .In the community meetings you get pointers to popular blogs, newsgroups and sites at http://www.microsoft.com/sharepoint/community. The site also shows the SharePoint MVPs – SharePoint gurus who you should connect with in your area.
There are several Online eLearning "clinics" for developers and IT Professionals. An online eLearning clinic contains a few hours of content and provides a great technical overview. Best thing: it’s currently free. You can find pointers to all the clinics from https://www.microsoftelearning.com/catalog/itprodev.aspx#officeSystem2007. Here is the list of classes taken from that link:
Online clinics covering SharePoint technology are free for a limited time!!!
— WSS Development: http://www.microsoft.com/learning/elearning/course/5045.asp
— WSS Infrastructure: http://www.microsoft.com/learning/elearning/course/3369.asp
— MOSS Development: http://www.microsoft.com/learning/elearning/course/5046.asp
— MOSS Infrastructure: http://www.microsoft.com/learning/elearning/course/3370.asp
On Demand TechNet WebCasts