testable AtomPub binding?

Hi,

I was trying to look at the AtomPub binding in an exsting 
implementation. What are good implementations to look at right now, 
either online or with a simple installer.

So far I only have looked at Alfresco, which however seems to be a bit 
too experimental (for instance, I was trying to understand how 
getAllowableActions looks in practice, but it doesn't seem to support 
that yet...).

Best regards, Julian

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