This is from an e-mail I was sent by someone who works for Acer, when I asked about the same issue:
"Having investigated this a bit more, it seems that Gateway sold the Amiga brand in 2000 which I’m guessing included the patent rights. I will try to get verification on this and update you ASAP."
That was from back in November, haven't heard anything since. Hope someone else gets a clearer answer.