Fox on Demand is currently showing the first 17 minutes of the season premier of Prision Break.  I believe that the video is only up for a limit time, so hurry over and check it out.

I haven't watched it myself.  Prison Break isn't one of those shows I need to spoil, I'd be happy to wait until it premieres.  Although, I am really happy with Fox's willingness to put the spot on the web.  The more shows available on the web the better.