it's a resourcing issue. For various reasons there are only a few people who have access to the servers, and they've been busy with other backoffice stuff such as moving mail to a different server, investigating problems with sql (it turned out to be a hardware issue), working with the continous integration setup etc. I believe the current intention is to dogfood the site with the proposed release of dnn 4.3 (the next release), so this won't be the case for much longer. As the 3.x and 4.x versions share identical features, it's not been an issue, though we're obviously keen to put 4.x through serious stress testing and dotnetnuke.com is the ideal environment.

Cathal