The old website has been taken down and engineeringpark.org now redirects to this collective page. This was done in an effort to simplify the organization and administration of these resources, especially considering that the old website has lost most of its relevance over the past 18 months or so. 

I am hoping that, between the resources offered by Open Collective and Decentraland itself, it will be possible to do away with the traditional website completely. If anything, I've come to the conclusion that something like GitBook will be more suitable for the EngineeringPark project than a traditional website.