"DM's Idea Pipeline: 2004 Collection" by Michael Hammes and Philip Reed
Published and distributed by Ronin Arts
ISBN = unknown -72 pages
Ronin Arts obviously meant this booklet to be the beginning of a line of idea pipeline selections, but as for as I know, there were no books either before or after this one.
The ten chapters include a host of new feats, new classes, new spells, new treasures, rumors, new contacts and NPC's, locations, events, and monsters. I particularly liked the Specialty Priests, and loved the Elemental Priests. There are four new Prestige Classes, but I, personally, found them to be uninteresting. The Spells and Treasures are a mixed bag of good and not-so-good. But, I use rumors quite a bit to start new adventurers for campaigns. There are only nine of them, but the small amount of basic info provided makes a great jumping off place. I also use NPC's for the same purpose, and the fifteen provided here have good info to give to players. The ten locations are good in a city setting, and the five Events include some really good ones. The four monsters, and one unique monster (you have to see it), have a place in many D20 campaigns.
GM's may want to scan this book to see if the info is useful to them or not. Personally, although I liked it, I thought it was generally a mixed bag of varying quality.