Does anybody know where I can download them or aren't they released yet ?

Umm.. If I'm not mistaken, there are only 260 chapters of Hunter X Hunter out right now. I believe the 261st one that you have is the fake chapter of everyone being gay. And again, If I'm not mistaken(seems a bit repititious), Yoshihiro is on hiatus and there really isn't much news of when he will be back... Us fans have been waiting practically forever for that golden day to surface... Doesn't look like it will be any time soon, so don't get your hopes up.

According to this image circulated by members of the 2 channel online community, Yoshihiro Togashi's popular manga series Hunter X Hunter will return to the pages of Weekly Shonen Jump on October 6.

The popular series, which has been on hiatus many times in the past for various reasons, was last published in early 2006. No explanation has ever been given by the publisher or Togashi for the current hiatus. The news about the series was featured in a recent issue of Jump and coincided with an announcement for the 24th volume of the manga, which goes on sale in Japan on October 4.

I hope thats true. I havent read much of the HxH manga, but from what I hear it comes to an ubrupt end. the anime was among my favorites, and if they were to continue publishing the mana, I would gladly start reading again.