Anybody remember when that other hacking site was posted by Ace? This site is the same thing but that site has moved and has undergone many improvments. They now offer realistic missions, application challenges, encryption challenges, and programming challenges.
The website's URL is http://www.hackthissite.org . It's really fun, especially when it gets to the realistic missions.
Check it out, it's a big site now with thousands of users. My id there is lebincanada, so if you need any help ( I can offer help since I've beaten all realistic missions and basic web hacking), you can send me a message there or just post here.
Enjoy the Site!
Isostealer