There are only a few companies in Utah that are doing more than $10 million in ecommerce revenue annually: one of them is iBoats.com. Here’s a great interview with one of the iBoats.com founders.
Other companies in this category include Backcountry.com, Overstock.com, and Hobbytron.com — these were all internet pureplays. Internet Retailers Top 300 Guide (an excellent resource) also list FranklinCovey, ICON Health & Fitness, and 1-800-CONTACTS as top e-retailers.
If I were a young internet entrepreneur in Utah, I’d first get hired by one of these companies (or anyone in the Top 300 list), preferrably in the marketing or web analytics space, and then, after learning from the best, I’d go out on my own.