From the press release:
As a previous Eudora and now Thunderbird fan and user this looks quite interesting to me.""The Mozilla Foundation and Qualcomm have announced that future versions of the Eudora mail client will be based on Mozilla Thunderbird. The first Thunderbird-based release of Eudora is expected to be made available in the first half of 2007 and will be both free and open-source. According to the press release, it will retain "Eudora's uniquely rich feature set and productivity enhancements". Thunderbird and Eudora will remain separate products, though they may benefit from common improvements in the future."