The Mozilla-Eudora partnership has debuted Eudora 8.0 beta 1, a new release of the Thunderbird-based email client that incorporates the "Penelope" add-on. Whereas Eudora is a Thunderbird-based client with extra features added by the Eudora developers, Penelope is an add-on that adds additional functionality to both Eudora and Thunderbird, but is bu
