However the most important modification is definitely the layout which relies on jQuery/CSS3/AJAX and has a better look and feel than the current site, screenshots will appear on the forum in the near future when I feel I'm ready to.
Because this used to be a hack challenge site, I will return to basics and make more challenges in the future, also will debug the existing hacking challenges in order to squash the last bugs in the site.
For now stay safe and happy hacking! ;)