It was the i-wireless center in Moline, Illinois (just across the river from my school I played for in Iowa).
Capacity is 9200 and it was about 2/3 full so must have been closer to 6000.
My first season we played on this ice rink in Davenport and it seated like 500. But the next 2 seasons the i wireless gave us a better deal for our games. Most of the teams we played played on small rinks too. So was always nice to play on bigger ice rinks.