The official php client includes a Facebook object (and a
FacebookDesktop object as well). This object uses FacebookRestClient,
but it also exposes a wealth of useful functionality which is sorely
missing from the current Java client.
I am writing a feature-by-feature Java implementation of this object,
and I would like to know if there is any interest by the developers
and users of this group to include it in the next version of this
project. Including this object will not break the drop-in
compatibility, of course.

Features provided by this object:

1) Verifying that the various fb_sig_ parameters are authentic, using
md5 hashing with the app's secret key. I think this is an important
security feature. Facebook expects apps to do this, and with the php
client it happens automatically.

2) Easy to use methods for login and authentication.
Facebook.require_login() to force login, Facebook.require_add() to
force the user to add the application, Facebook.require_frame() to
force the app to be inside a facebook frame (as opposed to a stand-
alone webapp).

3) The above mentioned methods use a smart redirect feature. It emits
an fmbl redirect code if the page is in a canvas, or sends a "frame-
bypassing" redirect if using an iframe (so you don't nest duplicate
facebook navigation bars), or simply sends a redirect if the app is a
stand-alone webapp).

3) Additional useful methods, such as Facebook.is_fb_canvas(),
Facebook.is_frame() to determine if the app is in a frame or canvas.

4) Fall-back to using cookies for authentication if the fb_sig_ params
are not present (I haven't implemented this yet).

Please let me know if this would be useful for this project.
Thanks,
Yoni