I posted a good while back about not being able to get my tray to work with ODPlus. This was on a laptop with an ATI Radeon card. I recently updated the ATI drivers to the latest compatible Omega drivers for my card and magically upon restarting the computer - my glorious systray was up and running in OD.

So, this may not help everyone, but it may be worth a try. You can get the Omega Drivers here: http://www.omegadrivers.net/ati.php

Hope this at least helps someone
-scaudill