If anyone has any questions about Barley I'll answer any of them that I can here.
Is it a hosted service? Or something I run on my server? What server technology does it use?
Currently it is hosted with an API that we are planning to open up at a later date. Right now we want to control the experience until we work out any bugs that may arise.
More options will be available after that which could include a variety of things from installing on your server to just using the API to sync data.