I have just published a new article, the last one for 2011.
No .Net programming this month, only SQL code, but still, I sincerely hope, useful for you.
This article is about the Grouping Sets feature of Microsoft SQL Server 2008 and above.
You can read this article from http://www.emoreau.com/Entries/Articles/2011/12/Microsoft-SQL-Server-Grouping-sets.aspx.