hmmm...generally Struts is considered a replacement for servlets but it seems like you should be able to forward to a servlet after your action is executed. Are you able to execute your servlet by entering the URL directly in your browser's address bar? If so then you just need to use the same URL in your forward.
Brent is right.. you can specify a Servlet as a forward, but you have to remember one thing: In this case you must specify redirect="true" when you define the forward.
Note: Just because you can do something doesn't mean you should do it. I think mixing Servlets and actions in an application is a really bad idea. An action can do anything a Servlet can, so why not write it as an Action? About the only situation I can see that such a mixture might make sense is if you have an existing application that uses Servlets, and you'd like to integrate it with a Struts application without completely rewriting it. [ January 16, 2007: Message edited by: Merrill Higginson ]