http://www.hackthissite.org

well i dont know if you have heard of this site but pretty much it challenges your hacking/programming skills (legally )


basic web hacking.....................simple find the password
realistic web hacking..................same as basic, except for realistic situations
application hacking....................usually consist of finding serials
programming............................forces you to create a program to solve the missions


you can try it out. the application challenges are fun

Yeah I have seen it. Pretty nifty

Yeah I think that is a cool site too. They have some cool challenges.