i read that humidifier thing too. here's what i saw at RotoWorld:
There were just 9.8 runs scored per game in Coors Field during April. That's down from 15.1 runs per game over the previous seven years. This trend will probably continue, but it should not be expected that run scoring will stay this low all season. Deadened balls will hurt home-run totals, but they won't change the fact that it's very difficult to throw breaking pitches in Colorado. Run scoring should remain higher in Coors than in other fields, just not to the extreme level of the past. There is also the chance that the Rockies will stop using the humidor should attendence decline.
So it looks like the humidifier effect is for real, too bad for rockies hitters, it obviously hurts the Coors lightweights Uribe, Ortiz, etc. as well as the big guns, but I wonder if this add any real value to Hampton, Thomson (who's hot recently), and Neagle?