You can access information about the uploaded file with the getFileInfo() method...

Also the temporary filename is available there.
So as long as you do not have filters you could simply:
* validate the uploaded files
* call getFileInfo()
* rename the file yourself
* and finally not receive the file so it will not get stored on the system...

Of course when you use filters you would have to
* receive the file
* work with it (emailing it)
* delete is on the system

__________________
Greetings
Thomas Weidner
I18N Team Leader, Zend Framework
http://www.thomasweidner.com

Nice one. Many thanks Thomas!