Picasa REST apis wrapper in Ruby(gem) or a Node package

I was wondering if there is good API wrapper client for Picasa in Ruby or Node.

I came across a few, but none of them supports OAuth2.

Google has really good support for most of its services that are exposed via REST apis, but not so much for Picasa.

Also, the response for any Picasa API is invariably in xml format. Is that intentional or simply the apis are too stale to support JSON?(and yes, I am sending format as json in headers)

Parsing an xml response is itself a time consuming job and makes my feel really slow.

Can anyone suggest what is the best means?