I'm open to an idea of a concept generator... but i rather it be like you guys come up with your own concept ideas.
random raffle generators are cool and all but if you come up with concepts yourselves albeit in word form, its gonna be a more wholesome and useful exercise.
the site you're looking for is called
www.autodestruct.comunder thumb war
please don't skip to the generator but read the advice he gives on working in the concept art field because its mega tons of useful. Its paul richards site by the way, the guy who did most of the quake and darksiders designs and is now working at blizzard for the new next gen mmo.