Hey guys, sorry for letting so much time pass. Unfortunately, while the problem was obvious (soundcloud no longer supported flash, which was what the original code was), there weren't many resources available for integrating the HTML5 player on vbulletin.
In any case, the players should now be available. If they aren't, double-check that your soundcloud URL used is still working.
Does it look good for you guys so far, or any issues still going on?