>>Sorry, was a but sloppy in my use of namespace. It's HttpApplication.CompleteRequest() - which has been around since 1.1
>
>But, wasn't that link using CompleteRequest() at the HTTPResponse level?

No, that's what it seems like (and why I just used Response.CompleteRequest).
If you actually follow the CompleteRequest link it goes here : http://msdn.microsoft.com/en-us/library/system.web.httpapplication.completerequest.aspx