Chill Pill for Mac

From Conceited Software:

Shaun Inman's latest web-app sensation now with OS X integration. Enjoy Fever's rich RSS experience while taking advantage of Cocoa and all of the other modern technologies in Mac OS X.
So what's cool?
System-wide Integration
Filling the void where web applications fail, Chill Pill allows you to set Fever as your default RSS reader, change hot keys via System Preferences, get notified when new items are available, and much more!

Custom Styles
Let's face it, Fever is beautiful.. but everyone has their own style. Using Styles, you can tweak the interface to your hearts desire. All styles are simply CSS files, a mordern web standard. Share your styles with other community members on the Conceited Forums.

Everything you already have Since Chill Pill's job is to make Fever better, you have all of the awesomeness of Fever coupled with an even more integrated experience. Yeah, we didn't think it could be this awesome either.