Planting "upside down" tomatoes appears to be a big fad right now. While the practice is nationwide, there are some Colorado-specific concerns from Planttalk Colorado.
Many on-line comments about hanging tomatoes talk about wind damage. Some advertisements for upside down tomatoes suggest that they be hung from a tree or deck. Trees, roofed decks, and nearby houses cast shade and tomatoes need full sun for good fruit production.
Another concern is the size of the container (root size) to support a large tomato plant. One brand of hanging planters calls for two pounds of soil. This small rooting volume would not support a large tomato plant in our hot, windy climate. Only a small container size tomato variety would be suitable."
Be cautious about plant placement, remember to water frequently, and choose your variety wisely.
For more information about growing tomatoes in the home garden, see this fact sheet.