This is interesting. I heard about a search site on NPR that features results from Bing and Google, side-by-side. Check out http://www.bing-vs-google.com/
I didn't especially care for the new Thunderbird interface in WinXP (I use claws in linux) so I downloaded Eudora 8.0b7 at http://www.eudora.com/betas/
This Eudora beta is built on Thunderbird anyway, but I *really* like it. :-* No stability issues here and very easy to configure.