We've been doing this for a couple of years although it's not part of our standard install so a lot of people aren't aware it even exists. Our customers typically take responsibility for their own tours and do their own thing. We don't have a way to keep track of who's using this setup but these are a few examples I know of where Elevated X run member's areas have been mirrored to work as tours:
http://www.nitrovideo.com/
http://www.vidsod.com
http://www.zztits.com/tour/
It does work well.
I'll leave it to Czarina to post more recent examples and show off some of her work
AJ