Looks great! and great team!

Thank you and all good for you :)

is there any SDK or API?

Yeah, we are using rails devise gem to handle our login.

Nice, I built something like this before too, but with much few feature.

http://myapppage.herokuapp.com/demo?appID=471966214

wow, impressed

Thank you for your good word :)

It seems very cool. :) Just download it. And check out the landing page we create for your app. http://bit.ly/IBRJhw

Example page: http://myapppage.herokuapp.com/demo?appID=471966214

@bablubb, thank you for your feedback. :) We are currently implementing Amazon S3, so in a near future, we should be able to use Dropbox as a client to upload podcast file to Amazon S3 and host over there to avoid the Dropbox traffic limit.