BrowserWars picks up where Apple left off in providing an easy way to change your default web applications. Unfortunately, Apple's version favors a very few (ahem) select applications. Installing a new version of your preferred non-listed software often causes OS X to loose track of your settings, defaulting back to Internet Explorer or Mail.app. There is also a notable lack of OS X newsreader applications listed. BrowserWars fixes this by adding every web, mail and news application that we could think of. Upgrading or reinstalling your favorite programs now will no longer revert your settings to what Apple thinks is best.
ANONYMOUS OS X remembers quite well what my browser and email prefs are. I don't find the remarks about OS X accurate as both Chimera and Netscape always stick as my preferred browser and email app. Chimera used not to stick a few months ago but that has long since been resolved. (Version 1.2.4)