It was released a couple of weeks ago. The album from which it's taken is called Collision Course is as they say "in stores now" check out http://www.lpjz.com/
for more info
i actually think the cd is a little bit of a rip off as theres only 6 songs but its got some pretty cool remixes on it!! i think personally to really enjoy it u probably have 2 like both jay-z and linkin park?
I bought the cd/dvd double of 'collision course' which was the same price as the cd in virgin. The dvd is pretty cool and the other tracks are good too