This question was asked by one of our beta testers so I figured others might be curious as well. Here is a sample of the current beta group:
Freelance designers Web Design Web Development Creative Services IT Services Software Development Retailer Home Improvement / Remodeling Quality Assurance Department of a Large Software company
Intervals was designed to be an "accountability" tool and although we are a web design and web development company we deliberately did not make it for our industry only.