Not only is the super pass a great deal for Snowbird (u save something like 20 bucks on the full access pass) but the super pass includes all day travel on public transit. If you happen to make it a short day, and have the strenght, you can go into town on the TRAX and have some fun. I've always meant to try to catch a basketball game. I think there's also a minor league hockey team.
The superpass isn't as great a deal for Solitude or Brighton, but i think it's still marginally cheaper when you include the cost of transport to the mountains.
If you want to see a story I wrote on salt lake, this is one of the site that still has it up: (it has a couple links at the bottom that might be useful)http://www.postgazette.com/pg/06005/632527.stm