Some info: - Pretty decent amount of press: http://www.inbox2.com/press - About 100K downloads - Built by 1 dev, 1 part-time interaction dev and 1 designer, all pretty much during the evenings and weekends - Beautifully looking, but nevertheless a commercial failure because nobody will pay for email (now paying for data is a whole other story) - Learned more while building this thing then in all my previous ~10 years of consulting combined