This isnt a big deal just because its Julius Peppers. Its a big deal because 1) There was a rumor the Packers were interested in a free agent 2) The Packers signed a free agent. 3) you wont see the Packers sign a free agent for another 8 years.
The last time this happened we brought Charles Woodson in and it completely rejuvenated his career. I think we might see the same with Peppers once he realizes how fun it is to win the North and be on a team always in Superbowl contention.
Now with all that said, im sure Ted Thompson right now is thinking "good ged, what have i done?"