Hi Steve,
I've had a passing interest from time to time, mainly via the Pentax stereo adaptor and viewer set for transparencies. It's surprisingly effective in the right circumstances. I also bought a fairly elderly stereo print viewer and a set of sepia stereo prints that came with it, mainly showing scenes from the Empire (as was). I've occasionally thought of shooting b/w film on the Pentax adaptor and then printing the results as stereo pairs to use in the print viewer but (like so many things) haven't got around to it.
I do tend to regard stereo as little more than a gimmick really, as the results whilst interesting are rarely realistic, usually giving several distinct flat objects at different distances rather than the continuously variable effect we normally perceive.
Two weeks ago I attended the BVE exhibition at Earl's Court, where the flavour of the minute is stereo TV. Things have definitely moved on since a couple of years ago, but as long as stereo viewing (TV or otherwise) necessitates the use of special glasses, I have to put it largely in the same category as Sensurround sound, automatic windscreen wipers, self-cleaning ovens, etc.. One exception is in the field of aerial photography, where geological surveying techniques make very good use of deliberately exagerated stereo images to study land forms.
My most amazing experience of stereo cimematography was at Bradford Film and TV Museum, where I saw "Ghosts of the Abyss", a film of the wreck of the Titanic at the IMAX.
Steve