Since I don't have the NFL Network, I started searching for live feeds.
Well, I stumbled upon this site: http://www.streamednfl.blogspot.com/
Which has many links to the games. (I haven't tried the TVAnts yet, since SopCast Worked so well).
In order to watch them, you must download a program called SopCast, which can be found here:http://www.sopcast.org/
Once installed, click on the SopCast link for tonights game (Browns at Pitt).(Browns at Pitt)
I logged in anonymously and I am watching the pregame right now. The game starts in at about 8:00 pm tonight (eastern time).
Hope this helps some peeps out. I know it did for me
Later - tripp