I'm testing RSSOwl and find it very nice and user friendly. Just one thing I'm missing from my previous aggregator: could the news popup play a sound when showing? Of course, the sound could be personnalized and disabled ;-)
Perhaps also the popup could show the title of the collected news (maybe too much if you have many feeds?)
Or perhaps I didn't find the setting?
Playing sound with java is tricky as far as I know. I could do some Midi sounds, but that is not what you want here I guess.
There is already a feature request open dealing with the issue that the Newspopup should give more information.