@plaz
Amiga Inc owns both Amiga trademarks for software and hardware (look US patents office). The question is do they have a registered trademark in Australia and if they do it must cover computers...
However I would assume Commodore registered Amiga trademark in Australia and it was transfered to Gateway->Amiga Inc->KMOS->New Amiga Inc (keeping a trademark alive costs almost nothing).
(Edit) Here it is:
Word: AMIGA
Owner/s: Amiga, Inc.,
a Washington Corporation
24403 256th Avenue SE
PO Box 887
Ravensdale, WA 98051
UNITED STATES OF AMERICA
Class: 9 Computers and computer peripherals, and parts, accessories, components and fittings therefor; computer programs and software
Found from ipaustralia service.
Amiga Innovations being computer store abuse Amiga trademark too.