This is the lastest of great AX resources becoming available. This site is an umbrella site for existing information. It ties together news groups, blogs, training materials, downloads, online documentation, and much more.http://msdn2.microsoft.com/en-us/dynamics/ax/default.aspx
It didn't take me long to realize this should be my default home page for my iexplorer - this is a site I'll be visiting a lot in the future. Make sure to check it out yourself!