Memory may be inaccurate after 10+ years, but the last communication I recall from Opera themselves was that an agreement was signed with a development group for an Amiga version and code was forwarded to them. (Opera Version 3.x I beleive) But after some amount of time there was no further communication from that Amiga group, so Opera considered the project dead and closed. With Commodore's demise and Amiga's future in sever doubt at the time, they declined to seek a new Amiga dev group.
Plaz