cthulu at  Java Fibs creator
will know having written it.

alef I believe once did some custom boards multi talenteted

If you had just made it a bit further down the list of topics to 'Other fibs clients' and looked in there - perhaps you would have seen the topic 'Mobile Clients' with links to and discussions about clients for mobile phones I understand that you probably came here because phones use java - but this is about a specific client for PC or MAC - follow this link to something more relevant http://www.fibsboard.com/index.php/topic,898.0.html. 

I wouldn't advise it though - the connections are very unstable - you will quickly rack up a lot of saved games and an associated bad reputation.  I personally gag anyone I see log in on a mobile client to ensure I don't take an invite from them by accident.  Sorry - but the constant dropping and reconnecting - or worse still, not reconnecting, makes for a very miserable game.