FYI - found a bug: Yesterday I started doing some exercises, but I guess the site was getting hammered and some of them were never marked as completed. So today I finished the exercises and re-completed the ones that were never recorded as completed. Now I have two "Getting Started With Programming" badges and two "25 Exercises Completed" badges. Just wanted to let you know.
i installed it. i think it's pretty nice but still needs some work. for example, i don't like that it opens the links in safari. i'd rather stay within the application (like the reddit app). if i'm going to end up in safari every time i want to read something, i'll probably just use http://www.icombinator.net/ instead:(