Dunno if that's something you can search for on RCDB, but my guess is not many if at all since there's only a few that use switch tracks during the course (not counting switches for duel-loading stations) in general, and even less with fast switch tracks.
Only non-Intamin I can think of that has a switch track is Expedition Everest by Vekoma, though I'm guessing there's maybe a few more out there.
Funny thing is I remember when I was a kid wanting to design coasters I was inspired by the flipping transfer track of BBW to think that would be really neat to use it on a ride somehow. Of course, my thought was more or less a randomized experience where the switch would have you go down separate tracks that do different things. Depending on timing, possibly even set up racing or dueling elements, before the second switch to bring everyone back to the station.
But how awesome would that concept be if they implemented it to whatever is coming?
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