Okay, I'm going to steal away the microphone from Roboashura, if he doesn't mind. Or does. I don't care. Don't be a sod.
Anyway, 4Kids are extremely inconsistent with uncut DVDs. Despite their success among consumers, they are completely blind to their potential. That's pretty much why the next DVD volumes for Yuugiou and Shaman King are being delayed indefinitely.
Also remember that Sonic X in English is not drastically different from the Japanese version: Storylines are generally the same, none of the episodes have been cut or spliced completely, and character names have remained consistent. I am quite sure 4Kids doesn't feel the need to tend to uncut Sonic X DVDs. Plus, nearly the entire first season bar the first five episodes were horrendous. It felt like watching AoStH all over again, but worse. I can't imagine why I would ever want to watch them again.