The AFI screened all three movies to coincide with the award they gave George in 2005, and they were all the '97 versions.

The recent Empire 30th screenings have been reportedly been all digital.

The guy who puts on revival screenings in my area has expressed frustration at not being able to get any Star Wars prints at all. I presume this includes the prequels...

Ironically, I was at a bargain theater to see Revenge of the Sith when I noticed Raiders was on the marquee five years ago. I've also had the pleasure of seeing TOD again in the same venue since then. Both screenings had several fully costumed Indys in attendance too. :)