Doctor who theme is probably too obvious, but it would work ...
http://www.youtube.com/watch?v=oQj7hrZK4po
(With Tardis sound for world jump ...)
http://www.youtube.com/watch?v=TMlle...eature=related
Celjabba
Edit: for some reason, i am thinking of this, too.
http://www.youtube.com/watch?v=ANZ45vCCUe0
Not intuitive, but i think the recurring fast theme(first at 1:05) would do great for a conveyor jump.
And the various part around the leitmotiv could easily be various worlds.