Catherine over at Women Learning Thai has written a post about the FSI Thai Wiki Project, a collaborative project that we helped start, with the goal of digitizing the entire U.S. Foreign Service Institute's Thai language course, and adding Thai script in the process. The original course uses only romanized Thai, something we think needs fixing.
We're working on this via wiki, which means that we want and need your help. If you'd like to help type out some of the Thai, proofread some of the English, or format some wiki pages, then please send me an email at rdockum [at] gmail [dot] com.
The two-volume FSI course has a lot of excellent material. Drawing heavily from Richard B. Noss' (also excellent) 1964 Thai Reference Grammar, it remains very useful nearly half a century later. Sure, parts of the FSI course are outdated, but as I've written before, you can't beat the price. Courtesy of the American taxpayer, you get a 40-lesson course complete with accompanying audio for each lesson, and an audio introduction to Thai phonology. (Get them in PDF and MP3 format here.)
Please see Catherine's post for more information, or the Google Group that I started for this (and future) collaborative Thai language projects.