From an email with the site owner
With regard to the FlyerTalk comment about the domain having expired, when I look I see the following:
Updated Date: 28-sep-2015
Creation Date: 27-sep-2004
Expiration Date: 27-sep-2016
But the DNS servers cannot find the domain. It looks like the registrar may have fumbled and incorrectly marked it as expired, then fixed it, but the DNS servers have not yet picked up the correction. I have some queries out but most likely it will clear up within a few hours.
Grrr.