The "Feedback" button is overlapping the most important UI element on the screen (the "Create" button) when my browser is at a width of anything less than 1036px. This isn't really acceptable... I shouldn't have to have a browser wider than 960px to not get scrollbars - much less to have something overlapping buttons.

Aside from that, I very much love this app. I'll definitely be using it next time I need a good domain name. One thing that would be nice is the ability to only show domains where the .com and/or .net is available.