Well, Pyro has stated in the past that at some point they will consider "wiping the slate clean" for 2 week trials and letting folks have another try. This hasn't happened yet, but keep an eye out.
Now you CAN play H2H with up to 8 players without a paying account, so if you want to see how AH is coming, give H2H a try. It's also a good way to introduce new players to the game, as you can get them started in a secluded environment where they won't get beaten down as fast as they would in the MA.
As for boats, CV groups and PT boats are available in the main arena online. They are also available in a H2H area as well should you host or join one. By default the H2H arena is the same as the main arena, there is just fewer folks in it.
You can also dowload and fly H2H in terrains that other folks have created using the terrain editor. You can download the terrain editor and make your own terrains for H2H play if you like as well. It's on the HTC download page.
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Lephturn - Chief Trainer
A member of The Flying Pigs
http://www.flyingpigs.com "A pig is a jolly companion, Boar, sow, barrow, or gilt --
A pig is a pal, who'll boost your morale, Though mountains may topple and tilt.
When they've blackballed, bamboozled, and burned you, When they've turned on you, Tory and Whig,
Though you may be thrown over by Tabby and Rover, You'll never go wrong with a pig, a pig,
You'll never go wrong with a pig!" -- Thomas Pynchon, "Gravity's Rainbow"