One other thing - though I'm sure you know: support for international character tables? I'm Swedish, and we have three letters of our own, and they fail to display correctly. Just thought I'd let you know.
Really, this is great! I've been looking for something like this since my girlfriend got her new mac and showed me the RSS-screensaver in OS X. Finally, I can challenge her! :)
I searched with google for something like this, but finally found it at del.icio.us. This screensaver is great, waiting for the hotkey to open the news (and maybe another one for changing the feed?!)...
pressing a hotkey to display the item would be brilliant, but prefer it in the screensaver rather than in a browser - and then a key press to continue. this is a beautiful piece of software. found it after seeing rss visualizer on a mac. well done!!!!!
As Jonathan said: When feed contents characters out of latin alphabet (in Polish ą, ę, ń etc) it doesn't display it. Would be nice to have possibility to changing font used in so we can choose good codepage.
Other methods of display would be nifty as well, as the zoom in makes it difficult to read for about 50% of the display time. If instead you just had it fade in and fade out as an option, that would most likely be more functional. All in all, really nifty program, thank you.