Fighters Only Magazine has a video interview with B.J. Penn after his appearance at the NSAC. 

Penn said this regarding his lightweight title (Props MMAMania),

We're looking for a return, we have to defend the lightweight title. It's been long, it's been overdue since we defended the lightweight title. I had to heal up some of my injuries that I suffered from the Georges St. Pierre fight. I'm all good now so we're gonna move forward with my same team, my same camp and we're gonna make a run to defend the lightweight title - I think it's either late July or early August.    

Penn is slated to defend his title against Kenny Florian. Currently it is rumored that the UFC's August event will be headlined by Antonio Rodrigo Noguiera and Randy Couture making it seem likely that Penn and Florian would be held for a September event.