After reading about LDs, I discovered that a LOT of movies/books I've seen/read are somewhat connected to LDs, maybe even not on purpose...
Here is a small list of the few I remember right now (and explanation):

1. TheWheelOfTime Series - 4th thru 11th book:
Dreamwalking > http://encyclopaedia-wot.org:8008/main/tar.html

2. Sergey Lukhianenko's "Zerkalniy laberint" series:
The whole book is about people connecting to a Virtual Reality which is "accessed" by getting hypnotized by a device that does flickering lights pattern so your brain gets "inside" the new world (person wears helmet with monitors, and clothing to emulate feelings).
The technology only helps you feel (since it's not all done by the brain as you are in the Internet... thus Lucid Crossroads?).

3. Vanilla Sky
The whole movie is basically a dream of a guy almost dying(?)

4. TheMatrix
Well somewhat related to N.2 and... you know..

Many Others.
Will continue tomorrow. Hopefully.