Played another game today against Marines.
I took:
FireWarriors (Mech) + Pathfinders - 350
FireWarriors (Mech) - 225
Crisi Suits + 1x Crisis Suit + Supremmme Commander - 400
Pathfinder Group - 175
Skysweep Support Group - 250
Hammerhead (3x Fusion/1x Rail) Support Group + Skyray - 350
Hammerhead (4x Rail) Support Group - 250
Recon Skimmer Group (3 of each) - 150
Recon Skimmer Group (3 of each) - 150
Manta - 700 (BTS)
Marines (from memory):
Tactical + Supreme Commander
Tactical + Hunter
Devastator + Hunter
Assault Marines + Chaplain
Bikes
Predators + Hunter
Landspeeders
Thunderbolts
Reaver
Things of note during the game.
The Reaver was fair game from the first turn. Having the Manta on the board meant that BTS was going to be hard for the Marines (they never fired a shot at the Support Craft all game). I used a co-ordinated fire with Recon Group, Skysweep and the Manta. After all that the Reaver still had 4 DC left (no crits). The Reaver evetually feel in the 2nd turn to the Manta (reduced to 1 DC) and then the Skysweep Group finished it off.
T/Bolts managed to stay out of AA range for the first turn. 2nd turn, they faced fire from 2 of the 3 Skyrays in the Skysweep Group. 1 was shot down.
I used Coordinated Fire twice during the game.
The Fusion-Heads were quite effective until they were broken in the 2nd turn (they shot up a Tactical detachment and killed the Predators using a crossfire).
The Crisis Suits fought off an assault from the bikes (thanks to difficult terrain for the bikes and good rolling for saves).
The Marines failed at least 3 Difficult Terrain tests during the game.
The Tau had above average luck during the game (at one stage, they had 7 attacks needing 5 or more and I rolled 5 hits ÂÂ

).
The Manta spent 2 turns shooting up the Reaver and the last turn, it fired on a Devastator  formation (breaking it). I liked having a really tough BTS (although against TK weapons this would be different) and it did good damage. I'm not sure if I'd use it often in a 3000pt game though. My opponent (Chris) had some good ideas for it in our after game chat though (planetfalling formation of death). We'll see.
The game ended on turn 3.
Tau:3 (BTS, TNH, Blitzkrieg)
Marines:0
Both players enjoyed the game. This was Chris' 2nd game against the new Tau list and his main comment was that Tau are a different opponent but still lots of fun to play against. He did not feel that anything was overpowered (although he did say that the Manta could rarely be worth going after for a Marine army).
On another note, we played at a local club (with about 25-30 people in attendance) and had many people wandering over to watch (with one guy following the whole game and talking about buying a Marine army as soon as he could)... WIN!
Cheers.