Today we've launched a ton of improvements we've been working on for the past few months, including a complete developer API (includes client libs for Ruby, Pyt

Today we've launched a ton of improvements we've been working on for the past few months, including a complete developer API (includes client libs for Ruby, Python and PHP), and a Facebook app to correspond to new social learning features we've added (and lots more). I thought it would be good to get a fresh bit of feedback on our site from the HN community, who've been a great source of inspiration throughout our development.