The Oakland-based, perma-stoned Green Ova rap crew doesn't much care whether you're listening or not, or at least that's the impression I get. The crew, anchored by the duo Main Attrakionz, had a relatively big year in 2011: Appearing on ASAP Rocky's LIVELOVEA$AP, working extensively with producer-of-the-moment Clams Casino, seeing their murk-rap aesthetic take over the internet-rap underground. But they ...