This page contains information specific to the writing of AIF. It all started with my simplistic ruminations about the subject, and then there was a trickle, and now a flood of folks writing about writing.
There was a thread in AGX a while back about this very topic. It sparked the writing of this short document which rambles about what I think is important to making a good AIF game. It can be viewed here.
We also have Rap's Writing Adult Interactive Fiction, which is a more complete and in depth look at the process of writing this type of game.
It looks like the writing bug has infected our community. Here is Newkid's 10 Commandments on Writing AIF.
And hey! In case you weren't expecting more in this area, this is what Optimus has to say about IF and AIF, go ahead and take a look.
The previous articles are all geared towards AIF in general. There are a few other documents you should consider reading as well. The first is Craft of Adventure, by Graham Nelson, author of the Inform programming system.
The next article you should read is called Crimes Against Mimesis.