OLAP 101

Found this blog entry:

Part I:
http://oraclebi.blogspot.com/2007/11/olap-workshop-basic-overview-of-olap.html
part II:
http://oraclebi.blogspot.com/2007/11/olap-workshop-part-2-understanding-olap.html
Part III:
http://oraclebi.blogspot.com/2007/12/olap-workshop-part-3-building-analytic.html

Some good basic info examples when you need to talk with customers