Update (July 2014) – Facebook Java mobile app has been updated to version 3.4.1 recently, so I have updated the download link given in this post with the new version files. The splash-screen and UI has been changed in the new version and the overall speed and user experience has improved considerably.
“Facebook for every phone” app for Java/J2me supporting phones (including Nokia Asha and Symbian Belle Refresh/FP2 devices – Nokia 808, 603, 701, 500, N8, C7, E6 etc) has been updated to version 3.0.1 recently. However it is not available in Nokia Store still which denotes the growing ignorance of Nokia towards Symbian. Anyway you can get it free from here (.jar and .jad in a zip file) or from here (login to facebook required). I did not notice