good RSS aggregators...

In my futile quest for a nice, tight, RSS aggregator I have become filled with a bit of disdain for the lack of a nice plug-in for Outlook, Entourage, or Safari. I did find a nice one for Firefox on a Mac, but that doesn't help me much. There is still too much of the web designed for the IE world. If you have one, that you think I should try out, let me know.