Open Source Software has the reputation of being functionally powerful, but esthetically challenging (at least in my little world...)

But having had a look at the current version of Camino and Thunderbird I was pleasantly disappointed: folks, you're lookin' good ;-) (at least on Mac OS X...)

While I still won't give up Safari and Mail.app as my main tools any time soon I'm thoroughly impressed with the design efforts of these two projects. This is something KDE and Gnome should take a good look at...