We had three separate threads about this now, so I've combined them.
I have been in touch with some of the staff from the site last last night. I don't know what the exact situation is now, but at around 1am GMT the then available information implied the site and potentially the server on which it is hosted have been been subjected to a concerted attack.
The issues with aminet and aros-exec were coincidental and not part of a wider attack pattern.
Since then, DNS is also been affected. The domain no longer points to the IP address of the server. There are a number of possible scenarios ranging from deliberate DNS cache poisoning to configuration issues or the result of measures taken to mitigate an ongoing DDoS.
I believe the site had a sound data backup policy, so once the immediate problems are fixed and any necessary post-mortem security fixes are in place, hopefully the site should be back up again.