Are you guys planning on releasing an iPhone app anytime soon?
It would be a lot more useful for people who have long travel and waiting times to spend that time learning a language instead of meaninglessly updating FB and Twitter statuses. :)
Even though I do not have an iPhone as of now, I cannot agree more with this. This would make Duolingo as popular as Google, people seeing it in the ITunes store (FOR FREE OF COURSE, just throwing that out there). It would be a bestseller.