Load testing with ASP.NET AJAX and web services

Hi all,
Does anyone have experience of load testing with ASP.NET AJAX and web services? I'm finding a lot of mixed information on the various forums.
My app allows users to input data into a db. Data input is done by passing data to a web service using the ASP.NET AJAX server callback mechanism. The web service handles the insert/update, and returns an Id to the client.

I'm interested in how the database performs with multiple (up to 1000) users entering data at the same time. Does it make sense to try to measure response times? Can it even be done with an AJAX application?
I'd be interested to hear how other have approached this.
Thanks,
Paul




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