DIS 320 Spring 2009

http://msdn.microsoft.com/library/: a place where you can search for detailed documentation for VBA functions. Suggest you book mark this link.
Duke University Excel Review : a big collection of excel related materials, examples, and tips
Mark Isken's links: a collection of links related to a similar course by Mark Isken. It is designed for MBA students, but worth checking out
microsoft.public.excel.programming: a quite Googlable usenet forum for EXCEL Programmming.