Not all the owners go AWOL, especially for pieces of code that were created for the purpose of going into production. In fact, the lack of official SDK support is the actual cause of so many alternatives. For some of us, it creates a proper foundation in the long run. For example, I don't have the actual time to implement an end-to-end SDK. But hacking some code to get the job done was possible, while others found my hacks actually useful. It isn't ideal, but the World itself is far from that.
Actually I am such an owner. I'm interested to see if the AWS SDK could be used as foundation, even though my own implementation is just a thin wrapper plus an S3 client, most of the time doing the low level plumbing (such as request signing).
