Know about XMLSS..
I was wondering how to display the contents of an asp page in Excel format without using server side Microsft Excel Automation Object. This was asked in an interview question to my friend..I read a nice example article at Microsoft to achieve this using Microsoft Office Web Component (OWC) XMLSS (XML SpreadSheet)..very interesting...
Use ASP to Build Spreadsheet XML for Client-Side Display
This is very useful and interesting to learn..