Project Idea using .NET

I need a project idea which includes 7 of the following 10:

1. XML
2. XSL/Xpath
3. Windows Service

4. Log4net / enterprise library block for logging
5. Generic collections
6. Multithreading
7. .Net remoting/webservices/wcf service
8. LINQ
9. Implementation of design pattern other than singleton and factory method
10. Enterprise library Data access block

Please help.

Thanks.