A question that I've had on the back burner for quite some time is what are the functions in SharePoint calculated columns.  I've taken a cursoury look here and there and never found the answer.  I've recently been passing direct messages via twitter to AndrewClark, @sharepointac, and he sent me a message that had the answer I've been looking for http://office.microsoft.com/en-us/sharepointtechnology/CH011711171033.aspx