The last illustration has been turned in and the layout is in the process of being finalized.
I should have something available for release by May 15th (L. Frank Baum's birthday). This will likely be the PDF version of the game, which will be available from DrivethruRPG, Paizo, RPGNow, and YourGamesNow.
I am planning to wait until I get proofs from all of my POD outlets, but once I'm assured that they can print the book so it looks like I want it to, you can pick up the dead-tree edition of the game from Lulu.com, CreateSpace, DriveThruRPG and RPGNow.
3 years in the making, Adventures in Oz: Fantasy Roleplaying Beyond the Yellow Brick Road is soon to be a reality!