07 April, 2006
Opera and JAJAH announce partnership
See Opera's Press Release.
I don't think this is actually too significant technically - as I guess it is the same as a FireFox Extension. (Commercially, I think it is novel for Opera to announce a 'Widget' for Opera 9.)
However, if the service is truly rendered in each page that you browse - that would nice. Particularly if you think of Opera Mobile - a mobile browser stealing voice minutes from a mobile operator - OUCH!