As stated on the subbed/dubbed page, there is no official release date for the Shaman King DVD's as of yet, only speculation that FUNimation will be providing the fans with an uncut version of the show, featuring both the dubbed and the subtitled episodes.
For now, though, you can still catch the dubbed version on Fox Box, but if like me, you'd rather rip off your own ears than listen to that monstrosity, you can always buy the original, but unsubtitled DVD's via CD Japan's website. That's if you're too impatient to wait and see if there really is going to be an official western release later this fall...
Of course, you can always check the manga out, too. Viz has translated up to volume three, which you can find at Amazon.com, your local book store/anime store, etc, etc.
The last manga book released in Japan was volume 30 (yes, yes, Viz are quite a way behind), and can be purchased from either Acclimate Solution, or JP Queen. I've ordered from both and they are very friendly and effecient.
For more information on the manga, check out either America's Shounen Jump site or Japan's Weekly Jump.
EDIT 10/09/04: Okay, so I first wrote this back in July of 2004, but since then, there *has* been an official release date for the DVD's. Volumes 1 and 2 will be released on October the 19th and each disc will contain three episodes each. You can pre-order them here at amazon.com, or from your nearest media store.