It would be great to see this app developed further. I like the tab implementation, but I wish it followed the CMD+ convention like Chrome and Firefox to switch tabs. For instance, CMD+1 to go to the first tab, then CMD+5 to go to the fifth tab from the left. There are no preferences either, so you're stuck with what is given, which is fine for me because I love the colors chosen for the code. But the one thing that keeps me going back to Smultron/Fraise from all the other editors...a built-in preview of the code. In fact, a live update of the preview. It's such a time-saver.