Michael Tsai has announced the release of SpamSieve 2.0, a major update to his shareware utility that brings powerful Bayesian spam filtering to various email clients such as Mailsmith, Entourage, PowerMail, and now Eudora 6. The amount of new features and enhancements are far too numerous to list here, but a complete list of what’s new is available from the Web site. SpamSieve 2.0 is priced at US$25 — upgrades from previous versions are free.