Over here at DaemonEye I've taken in two VPs who want to publish their pet projects. Basically, I help them with gussying thier stuff up when its ready to go, getting it on ROGNow, ect. They help me by providing 10% of the gross to business expenses (so far our #1 priority is saving enough for a non-geocities site). We help each-other because we consolidate our work under one "flag", providing each of us with a geater maret preasence than we would have as individuals.
At least in theory. Right now DaemonEye is still in it's infancy, and I'm the only one to produce product. It looks like the d20 guide is going good, and we will (hopefully) have our licensing issues ironed out, so the future looks bright!
The point of this is to illustrate that there is a third alternative for you: limited partnership. You produce the written book, and collaborate with your parent organization on the publishing aspect. Then the two of you split the profits. You get the benefits of a guide through the morass of publishing (even by PDF), and immediate market penetration by using thier name. They gain the benefits of a wider product line (diversification is a good thing), and a larger product library. In other words: a win-win situation. Just be sure to live up to your end of the bargain! I've already had two "vapor-authors", and let me tell you: it does NOT promote a good working relationship when you bug out with a near-finished manuscript after the other guy put in alot of work to help you get it to that state!