Hi Rob,
We still support RTX for 8.2 and previous versions, but if you would like to use LabVIEW 8.2.1 or newer, RTX will not be supported. I would recommend using ETS unless you have specific limitations that prevent you from doing so.
This KnowledgeBase article describes a little more about the differences between RTS and ETS.
Hope this helps!
Amanda Howard
Americas Services and Support Recruiting Manager
National Instruments