But now it's confirmed! The series, a slightly punky goth-themed fantasy action shounen series set in a sort of alternate early 20th century Europe, has been on hiatus since May 11th. However, the manga will be moving from Weekly Shounen Jump to Jump Square, which is monthly, so it won't come out quite as quickly.
This was announced in the 2009 Summer Akamaru Jump, a special Shounen Jump release in Japan that went on sale in Japan today which appears to feature the 187th chapter of the manga (and its final in WSJ). The first chapter in Jump Square will be in the December issue, which comes out in Japan on November 4th.
Fans will no doubt be thrilled that the manga will be back on, but the move to monthly releases will be tricksy-- the manga's English publisher, VIZ, appears to be releasing the manga on a quarterly basis at the moment, with volume 15 coming out in November. 18 volumes are out in Japan, meaning that VIZ will be caught up with that by summer next year. If Hoshino was still doing it weekly there would surely be more tankobon out by then, but on a monthly basis, VIZ will catch up to 'em pretty quickly, so the releases here will probably be a bit slower.
Still, though, better slow and steady releases than none at all, right?
-matthew