http://www.playonline.com/ff11us/ahturh ... siege.html
This looks pretty cool. Lots of information about it, looks like a massive uncapped garrison that you're basically forced into if you're in the wrong place at the wrong time.
And don't link me to the other thread, because frankly I don't give two shits. This forum is already a piece of shit, last thing that's going to hurt it is a single thread.