Opera Ice is deploying WebKit so its developers can focus upon coming up with an innovative user-interface and other rich design elements. It's expected Opera Ice will be released for Google Android and Apple iOS in February. Opera is expected to maintain their current "Opera Mini" mobile browser for at least a while longer.
In March, Opera will roll out a new desktop browser. It's not been explicitly stated whether or not this new Opera web-browser will also be powered by WebKit rather than their in-house Presto engine, but based upon hints from my Akvavit-drinking Lutefisk-eating friends, it sounds like WebKit will be used here too so the Norwegian company can focus upon the higher-level elements that are more likely to attract new users.
Embedded below is a video that came out this week about Opera Ice.