I just heard that Fileplanet is offering 30 days of free access to Everquest II to promote the new Halas content that was just released. I've poked around in the new Halas housing (very nice!) but I haven't really taken the time to roll up a new character to do the starting zone. This is a great opportunity for anyone who hasn't played EQ2 to give it a try though, as there's no strings attached to downloading and playing the 30-day trial.
As far as the nitty gritty of the deal, I take it they're essentially giving away a Shadow Odyssey retail pack, which includes EQ2 and all the expansions EXCEPT for the latest one, Sentinel's Fate. This deal works just like a retail box: you just have to pay the subscription fee to keep playing. However, if you really get into the game, you'll want the new expansion, so I guess that's where they expect to make their retail sale. Still, there's a ton to do in EQ2 between level 1 and 80, so by the time you're worrying about that 81-90 grind that I discussed in depth some months ago, actually getting around to buying the game shouldn't be much of a concern!
If you do decide to try out EQ2, make sure to look me up in game: the status bar on the right side of my site has up-to-date info on finding me in the games I play, including my main EQ2 character, Pyria, on the Lucan d'Lere server. Drop by, say hi, and tell me what you think of Halas!