Maybe a weird submission, but I just think it's a really clean, well-designed site. Even having never visited the site before, the user's immediately invited t

Maybe a weird submission, but I just think it's a really clean, well-designed site. Even having never visited the site before, the user's immediately invited to just type a password and go. You don't need to browse around and think about all the options. The philosophy is "do now, learn later" rather than "learn now, do later." It's really appealing for a user flitting around the internet with a 2 second attention span. (EDIT: If you have no idea what Mumble is, you'll need "How it Works" of course...)