From the Washington Post:
Unsung Campbell Registers High Note - washingtonpost.com
"The NFL hit Portis in the wallet. After Cartwright's 100-yard kickoff return for a touchdown Sept. 17 against Dallas, Portis raced 50 yards to congratulate Cartwright. Portis, who was inactive for that game, was notified last week that he has been fined $5,000 by the league."
Along the same lines, the 15 yard penalty sunday appears to have been for someone picking Moss up in celebration.
Okay, I have never been one for choreographed TD celebrations but, jeez, let the players show some spontaneous joy - you might find it infectous.