The Interactive Fiction Theory Reader is available on Lulu. It's a very nice compilation of thoughts about interactive adventure design and atmosphere from the text-adventure game revival of the mid 90's. In it is my old (I guess by now "classic" essay on interactive fiction, Crimes Against Mimesis. It's too bad I didn't have time to update it for the book - for example, by adding in material from this series of posts. But there you go.
Speaking of time being short, my "day job" is throwing multiple deadlines at me right now, so posting is looking to be intermittent through the end of the month.
I tend to make 4 kinds of posts: "program" ones where I work my way through a series of essays or observations; "product" ones where I give you something I've been working on, like the current Gazolba adventure or the house rules; play reports (mainly to keep a record of what goes on in my campaign); and "impromptu" posts where I riff on something that's turned up elsewhere in the web. The impromptu ones are easiest to do, so expect more of those in the next few weeks. And it's interesting that one such post - Why's There a Dungeon Under Your City? - is my all-time most popular in terms of pageviews.