Cool idea. The user experience of adding tags is pretty terrible compared to the rest. The placeholder text in the input field suggests you can use commas and judging from the tags it suggested such as "Design, Food, Movies" "Beer,Tech,Music" a lot of people noticed that. The suggestion pop-up is also kind of awkward sometimes as it occludes the input field and won't go away when you expect. You'll have to do some serious deduplication on this even after you fix the interface.<p>Also, it got stuck on me a couple of times after clicking "let's get started", with no way to re-do (it's all AJAX) and refreshing the page required me to do everything over.