They are always going out of business...lol. No seriously, I dont think the rumors are true, just that ATI has gone under a couple times before, so it wouldnt exactly be a huge shock.
I was saying this as a warning a while back when ATI first came t the US... that they could go under again and then everyone with one of their skimmers would have no more warranty/service/etc. Take it for what its worth though... out of business, or prone to, it means buying something from them could leave you out in the cold later on.