The Ork fleets are currently being substantially revised. The Clanz rules in particular are getting a total overhaul. The changes are posted up on the rules thread, the next update for the actual fleet list should be along in a bit. I'd recommend checking out page 14 of the rules thread, it has the changelog.
Here are the changes to the clanz rules:
Clanz:
> Clan upgrades are purchased on a per-commander basis. To buy any clan affiliations for your fleet, you must first pay +30pts for clan support, which unlocks the options for individual commanders. (Thus, the first clan upgrade you buy has an additional cost, to offset its wider applicability).
> A commander's clan affiliation (or lack thereof) applies to every ship under his authority, determined as follows:
A commander always has authority over his own ship and those of his squadron.
The Boss with the biggest ship (Space Hulk > Battleship > Cruiser > Rok > Escort) has authority over all other ships in the fleet, except those under the authority of a different commander.
> A ship can only ever have one clan affiliation, and a squadron may never have multiple commanders with different clan affiliations. Note that a ship's clan does not change during the course of a game, regardless of any commander's status. Finally, a commander's re-rolls may not be used for ships or squadrons with a different clan affiliation (commanders and vessels without a clan are exempt from this restriction).
> The bonuses are as follows (and cost +20pts each, except Snakebites):
Goffs: +1Ld to ramming attempts. When initiating boarding, the enemy ship does not add its turret strength to its boarding value.
Evil Suns: +5cm to speed and minimum turn distance when not touching blast markers.
Bad Moons: Unchanged (May re-roll one random firepower/str weapon; combines with More Dakka).
Deathskulls: May add +1 or -1 to Critical Damage rolls received. A Deathskulls commander may buy looted torps for his ship for +10pts instead of +20pts.
Blood Axes: +1Ld (Ork vessels only, not looted ships) until it fails its first Ld test.
Snakebites: +1 Assault point when scoring during Planetary Assault. This clan affiliation may be given to any ship or squadron without a commander, for no extra cost. This overrides any other clan affiliation the ship would have.