http://en.wikipedia.org/wiki/D-VHS
I actually have a Mitsubishi deck I got brand new pretty cheap on Ebay, but it doesn't have the logo indicating compatibility with D-Theater movies. I think one other board member has a deck, as they are pretty useful for regular VHS and S-VHS tapes. As they were high end machines, they were better made than most of the cheapo VCR's of the late 90's and early 2000's.
Do thrift stores still accept VHS tapes these days?