Notices

yes i am using jabber account for facebook. the chat is much faster and easier on battery than the facebook convers*tions plugin.

i also dont feel the need for a facebook app when i have chat so integrated, photo and video sharing plugin, and access to full site as well as touch.facebook.com

on iphone i would have to have the app open to get new chats, i think this n900 way is much better(always on chat in background)

Have you already tried:
http://touch.facebook.com
http://lite.facebook.com/

But i´m sorry. There is no APPLICATION for this.

Facebook status updates you can do from webpage and chat is integrated to N900 with jabber as is all the image/video sharing also.

.edit
Quite slow Had to take beer.

just like the twitterbox alpha which was announced..as simple as that

As a previous poster noted the great thing about the N900 is the plugins to the maemo platform that enable so many features. Photo sharing and chat are plugged in to the system directly, there is a widget showing my friends status updates all day long, when I touch that it launches lite.facebook.com which is very good on the N900 and gives me access to every feature of facebook that I need (I don't play any of the farmville games etc).
I have an ipod touch and always use that to compare experiences with my N900 and I much prefer using the N900 than the iPhone facebook app.