I use Eudora for email, and its excellent! Cory Doctorow posted a link to the Eudora press release, that announces "Future versions of Eudora will be free and open source, while retaining Eudora's uniquely rich feature set and productivity enhancements." It will be based on Thunderbird. Of course I just recently paid for Eudora, yes that's how good it is. :) But, at the same time there's a "Doh!" moment. Back when I used Netscape's email client (the last century, as a matter of fact ;) ), it only handled one account, and when I started accumulating so many email addresses, Eudora was my choice and I've been really happy with it. The latest announcement pleases me on a societal level, while still feeling a teeny pinch in the wallet, on my timing. Good on ya, Qualcomm!
Boing Boing: Eudora going open source, to be based on Thunderbird
P.S. Off topic, but from another post at boing boing, Pinball machine from the pinball's POV.