Yeah, the paul thumbies work with bar ends or DT shifters on your handlebars just like thumbies.
Update: I installed the bar end shifters as DT shifters and didn't like how they indexed worth a crap....they might be 9 speed shifters honestly, I think I was getting 8 distinct "clicks" on there.
So, I just reinstalled my old Exage DT shifters (7 speed) in friction mode. They seem to work flawlessly and are quick shifting, simple little dudes. I added a couple of drops of chain lube to the little loop of housing by the RD too.