Newbie Question

I was referenced this series by a post on the forums but after reading the highlights (not the article in full) I'm not sure this is the right starting point.

I am familiar with BI in the buzz words and some terms but all of my DB experience has been on the relational model side and not in Data warehouses or Cubes and certainly not MDX. I inquired about the Date Warehouse/Model/Cube business because I thought it might provide a solution for reporting performance issues we have but now I'm not so sure. Part of my problem is that I believe many of the BI terms like Data MArt and Data Warehouse have been misused by others I have listened to and so I have the incorrect idea of what these are and how they work.

Is there any non-BI guru overview of ANALYSIS SEVICES and when/why/how to use it and how it relates to the traditional relation database model?

Thanks