I spoke with the guys in charge of the courses in PA and WV. They say that there is a course being developed but that, even then, it will still require an in-depth curriculum review before they will implement it. The biggest problem with using 3-wheelers in the current course is that all of the course layouts are designed for 2-wheelers and they don't know how to adjust distances for something like a Spyder.
Even the 2-wheelers can't use their own bikes in the MSF course. They must use one of theirs.
I am an MSF dropout. Perfect score on the written test and was doing okay on the range until my 65-year old brain had to deal with clutch, shift lever, front brake, and rear brake simultaneously. It short-circuited!!
WV now has a 3-wheel license. As I understand it, for the driving test, you would take the Spyder on the road while they follow in/on another vehicle. I will know more when I go to DMV. I expect I'll have no problem since that short-circuited brain only has to deal with a foot brake.