In many secinarios i needed to set the page i want to open when the user closes the InfoPath form (browser enabled), after invistigating the browser enabled forms URL i found an intersting parameter, it is "Source".
the standard form url will be in the following form
http://londonmoss:36969/_layouts/FormServer.aspx?XsnLocation=http://londonmoss:36969/Forms/Forms/template.xsn&SaveLocation=http%3A%2F%2Flondonmoss%3A36969%2FForms&Source=http%3A%2F%2Flondonmoss%3A36969%2FReports%2FForms%2Fcurrent%2Easpx&DefaultItemOpen=1
you can just change the value for the "Source" paramter to whatever URL (must be in the same site collection) and in encoded format.
that's it 
any comments?