I just found some help resources and wanted to share my list here. Hope it helps you out!

Outside the product:

Microsoft Dynamics AX microsoft.com/dynamics/ax

TechNet http://technet.microsoft.com/en-us/library/gg852966.aspx

MSDN Developer center http://msdn.microsoft.com/en-us/dynamics/ax/default.aspx

Microsoft Dynamics Community community.dynamics.com

CustomerSource mbs.microsoft.com/customersource/northamerica

PartnerSource mbs.microsoft.com/partnersource/northamerica

InformationSource informationsource.dynamics.com – being decommissioned

Dynamics Learning Portal mbspartner.microsoft.com

By phase

Evaluating the product

Microsoft Dynamics AX microsoft.com/dynamics/ax

Microsoft Dynamics Marketplace http://dynamics.pinpoint.microsoft.com/en-US/home

Customization phase

MSDN Developer center http://msdn.microsoft.com/en-us/dynamics/ax/default.aspx

Microsoft Dynamics Community community.dynamics.com

Implementation and rollout

TechNet http://technet.microsoft.com/en-us/library/gg852966.aspx

InformationSource informationsource.dynamics.com

Microsoft Dynamics Community community.dynamics.com

CustomerSource training

Microsoft learning training https://www.microsoft.com/learning/en-us/default.aspx

Implementation

TechNet http://technet.microsoft.com/en-us/library/gg852966.aspx

Microsoft Dynamics Communities: Forums, blogs, and videos community.dynamics.com

Maintenance and support phase

TechNet http://technet.microsoft.com/en-us/library/gg852966.aspx

Microsoft Dynamics Community: Forums and blogs community.dynamics.com

AXSupport blog http://blogs.msdn.com/b/axsupport/

Partner sites

PartnerSource mbs.microsoft.com/partnersource/northamerica

Microsoft Partner Network https://mspartner.microsoft.com/en/us/Pages/index.aspx

InformationSource Library informationsource.dynamics.com – being decommissioned

Lifecycle Services

Lifecycle Services lcs.dynamics.com

How to find content

Bing and other search engines for publicly-available sites (CustomerSource, InformationSource and PartnerSource are not externally searchable)

Web search page: WebSearchAX (scoped search of TechNet, MSDN, Community, and Code samples)

AXSupport blog and Twitter @AXContent

Content strategy post on Inside Dynamics AX blog

Happy DAXing!