Wetsuits

Don't know where you are in Colorado, but Boulder area has two decent shops.  Colorado Multi Sport in Boulder and Adrenaline Tri Sports in Niwot.  I know Adrenaline rents wetsuits for the weekend ($40 for three days I think) if you want to try the wetsuit for a race.  If you buy the wetsuit within a certain amount of time, the rental fee is subtracted from the cost.

Along with the locations already posted Bicycle Village and REI both sell wetsuits. 

And BikeSource in Englewood - go upstairs to the tri section.

Might try Promotion or Xterra online.  Both very good suits and they usually get fit well the first time.  There's a 10%? discount at Promotion for being on BT and if you sign up with Xterra, they send out emails for 50% off sales.  Right now they're offering they're $600 suit for $299 and their $399 suit for $199.  This sale ends in just a few days and I can forward you the e-mail if you want...