I found out today that the website is back online and here I quote from the website the reason of staying offline for sometime:
The Indigo site is back online.
The Indigo site was compromised a couple of weeks ago, probably through a Wordpress vunerability.
The purpose of the hack was apparently to insert links to poker sites into some pages. None of the files available for download seem to have been touched.
Since then, it’s been offline while I reinstalled and updated the site software (Joomla, PhpBB etc…)
Some functions such as the artwork gallery and material database are still disabled, but will be reenabled soon.
Thanks for your patience,