Originally Posted by Josh-SEAnswers
Maybe you did but if you haven't yet try to reboot the phone to see if the widget is there one is back on. If not I'd suggest to do Menu>Settings>Applications>Manage Applications>Sony Ericsson Home>Clear data. with this you will be resetting the Homescreen then you will definitely be able to add the widget back again.
thanks, i was so hoping there is another option because with Clear Data i have to re-organize all five screens from scratch just to get ONE widget back.
by the way, i did reboot a couple of times, the widget did not re-appear.