When talking about MicroStrategy blogs, the first and most complete one is written by Bryan Brandow (MCEP). It is safe to say that he is the most knowledgeable MicroStrategy developer in the blogosphere:

Brian is part of the great MicroStrategy group at Facebook in Menlo Park, CA.

Another very interesting and focused on SDK is the one that David Ureña Cot (MCEP) is writing:

David is currently working as BI developer at Sony in London.

A worth mentioning and very complete blog is:

Where several contributors write excellent content and home of the famous Metadata Browser.

Tiwari Ashish and Sorin Suciu, two long time MicroStrategy users and very skilled writers are among the authors of:

And last, but not least, the MicroStrategy Learning Forum at:

Maintained by Raja Vel.