C'mon this is good:
Smart RSS for Opera
I love this. And the big inconsistency here is that this extension only simulates Opera's original news reader that they removed. The only logical thing here is to rebuilt this feature just like it was: on a web panel so you don't even have to leave your current page to see the news. It was practical, fast and you could organize your feeds the way you liked.
I never understood why they removed something like this. Oh, and it could fetch your mails also. Damn it was useful.