To be honest, I hardly ever give book trailers any thought. If I want to know something about a book, I read a review (or, if available, the good ol' fashioned back cover). I can only remember one time I looked for a book trailer, and it was after I finished the book. It did not add anything to my reading experience. The problem seems to be awareness--seriously, who thinks about book trailers outside of publishing/collection development/purchasing? Of course, it would take a MASSIVE marketing campaign, from lots of publishers, to change that. For the time being though, I don't see them as terribly effective.
I do, however, quite like the concept of fan trailers (or other similar fanworks, e.g. Tumblr photoset memes) that reflect the work through the eyes and imagination of a single fan, made out of love of the source material. But the audience for that kind fanworks is comparatively small--on Tumblr, a thousand 'likes' or reblogs of a post is fairly significant, and of course is not a complete record of all who may have run across it. In real world numbers though, a thousand people is not a large audience.
Overall I found this program helpful. Oddly, while I was exposed to lots of literature while working on my MLS (specifically thinking of my youth services and multicultural lit courses) we didn't spend a lot of time talking about how to get these books into the reader's hands. It seems like a strange thing to omit. With regards to this training, I think I would have benefited from face-to-face discussion and the ability to view the Bookish blog from home without going to ridiculous lengths--it was sometimes hard to find the time to work on this during my shifts.
