I've seen some posts from Underground Diesel holding a class in Vegas in July, but that's about the only one I know of with concrete dates at this point of time, although Starlite has some planned on the East Coast for Sept/Oct (I think??)
I've been trying to help the guys at Starlite get some contacts, so we can have a class in Texas. I found somebody around DFW that might let us use his shop.