What happened to the UJS site? UJS vs. RJS

The UJS site at http://www.ujs4rails.com/ has been down for several
I was wondering. Does that have anything to do with some recent
postings I've seen about UJS broken in the most recent Rails or could
it be that it's now incorporated in Rails? Either way, what to do now?
Where can I get UJS if the site's down?
Any comments on what's preferable, RJS or UJS?