The contest was held well over a year ago. Thus the results and information about it was taken down long ago - this is no recent thing.. just interest in it has again seemed to surface.
A nice guy has volunteered some space, so you will be able to download a file containing all the contest entries from a link at katatonia.com shortly. Unfortunately I don't remember or have documented who all did each song, but the winner was a version of Teargas with a strong country-slant.. got to hear it to understand!
As far as a future contest.. well, yes I am interested in doing another one if I see significant interest from fans in it. However the first one took an enormous amount of time and resources to put on, so it's not worth the time if there is only a luke-warm response..