http://www.nyc.gov/html/sports/html/metrostars_schedule.html The NYC Sports Commission has set up their 2004 Metrostars page. Not much at the moment, but as the season progresses it will be updated. They have links to Metrostars seasons of previous years.
Each link up-top has a "sports-ball" pic next to it, when you roll over the selection. Ironically, the Venues link has a soccer ball. Found it pretty given the Metros historical problems w/ a suitable venue.