Since when did application developers need to know about an analytical querying language like MDX? Since February 27th, next year. Thats when Microsoft will launch SQL Server 2008. Of course, youll still have breathing space because, as we are painfully aware, launching and actually delivering products are, in Microsofts world, now completely different events ..
The article continues at http://www.regdeveloper.co.uk/2007/10/22/mdx_intro/