How Dropbox Onboards New Users
useronboard.com
useronboard.com
I'm the person who made the teardown -- if you have any thoughts, I will be checking this thread often. :)
--Samuel
I enjoyed that you also did the Mario mobile game. I don't think too many game designers would make half of the mistakes Nintendo did there, but it's amazing to see so many examples of poor design in one place.
Regarding usability of your own site, I'd suggest not eating up the history of the user's web browser for every "next slide click" [0]. I was really annoyed trying to get back to HN to the comments section.