Load test - ASP.NET web application

Hi there,

I am looking for a free tool (open source) to do load testing of the ASP.NET web application.
I am not looking for something very fancy but something which is easy to use as this our frist baby steps.

I did google and found this link:
http://blogs.msdn.com/alikl/archive/2008/03/09/stress-test-asp-net-web-application-with-free-wcat-tool.aspx

The good thing about WCAT is that it is FREE.....Does any one has used this tool and have some walkthrough or samples or any other helpful documenation?

Also, please provide me direction/suggestion.

Thanks. ...