Amazon S3-like service?

Hi guys,

I need to have S3-like service that I can store files to. It's
critical that files stay on my servers, so can't use S3. I have found
"Park Place" project by whytheluckystiff - but I'd love to use OAuth
and it looks like is not supported.

Anyone have experience with such things or know solution I can use
rather than building my own Sinatra app?

Best, H