If I dare add something...
One of the Timbers Army slogans / songs... ROSE CITY 'TIL I DIE.
If you're waiting for the team to perform well to show enthusiasm, you're missing the point of being a fan.. though I'll grant that screaming on a message board has little to do with the energy required in the stadium. Still, PGE Park should be three hours of Hell from the stands.
Freakin beat the Ags!
(One note: the main Army superstition has become that you don't actually chant Rose City 'Til I Die until the Timbers are scored upon, lest you shall CAUSE a goal against. I do not believe that superstition should necessarily carry over to PSU, but that's up to you. I'd teach more songs here, but we tend to find that the NCAA frowns on profanity more than even some front office folks at PGE.)