[Thraymn]

What I've heard (on this site, a while ago) was that D-gray was halted because it got too close to the manga, and rather than go into a crap filler season like some other long running series, they halted.

From another site, I have also heard that the manga hadn't managed to actually gain ground yet on the anime because the person who does the manga injured her wrist, and thus, the manga was slated to get going again in early March or April - sometime around now.

Thus, though I haven't checked it myself, the manga should just have restarted again at chapter 170 or 180 - whatever it was at. It still, however, is way too close to the anime currently, so I wouldn't expect the anime to start back up again - if it does - until the first quarter anime season of next year.