As far as inducing flowering, the plants will move along at their natural pace as long as you're giving them the right conditions. If you haven't already done so, you should switch your lighting to predominantly 2700k bulbs (I'm assuming you're doing CFL's?). This redder, warmer-toned light frequency better simulates the filtered, less intense sunlight an outdoor plant would get in the fall when it would naturally flower. Also, you'll want to give the plants a little extra phosphorous and potassium. Other than that and whatever other tricks people do, it's basically just the waiting game while nature does its thing. Cheers on blooming there, man!