The Forgeworld list is the most used and quite balanced for the models produced by Forgeworld. It isn't a fresh list, still pretty same rules as GW list but the different models should really mean different rules/design philosophy.
http://www.sg.tacticalwargames.net/fanatic/(issue 75)
The list in Armada, now better know as the Tau Empire pdf under resources on the Games Workshop site is the one and only list for the Games Workshop produced models.
(See GW site)
Currently the High Admirality, rules committee, is writing a new set of rules for the Forgeworld models, the draft can be found in the rules question section of this forum. To be honest it is a crap, bad, annoying draft and I hope it'll never be official.
http://www.sg.tacticalwargames.net/forum/index.php?topic=1730.0(link to pdf at google, downloadable)
Under the main guidance of Shinnentai & Xisor on the former SG forum a Tau fleet based on Forgeworld models was made. It has some good & unique ideas but I think it is not quite 'it'. They wanted to update that list at a given point but the demise of the forum has stalled it.
http://www.beerbadger.force9.co.uk/Shinnentai/GW/TauCPFarticle.pdf(direct link to pdf)
Then we have Project Distant Darkness, my & Zhai Morenn's variant list. Based on the Forgeworld models. A fleet with a philosophy based on the models: less ordnance, faster, manoeuvrable, fixed forward gunnery. The list itself is a character list. The rules themselves are balanced but the fleet list makes it pretty 'odd'. For an official variant a normal fleet command structure should be adapted I reckon.
http://www.tacticalwargames.net/archive/rules/gothic/ddarkness.html(top link, link at bottom is story based scenario expansion)
Enjoy!
