Here's a video showing reverser deployment prior to nose wheel touch-down.
YouTube - SAS MD82 landing
As long as you don't have excessive pitch, there is nothing preventing you taking reverse prior to nose wheel touch-down.
I know on the F100/F70, they also take reverse prior to nose-wheel touch-down.
You try and avoid touching the brakes though prior to nose-wheel touch-down. It can make it quite uncomfortable otherwise.