Nate Mook at BetaNews:
Microsoft on Tuesday quietly slipped out Service Pack 2 for Office 2003, which includes a number of security and performance improvements for the productivity suite. Among the new additions is a Phishing Protection feature for Outlook that filters out e-mails trying to steal personal information.
Get it here plus a variety of others including Project Server 2003 Service Pack 2, Windows SharePoint Services Service Pack 2, Visio 2003 Service Pack 2, and Project 2003 Service Pack 2 among others.
UPDATE: Bink.nu has some screenshots of the Outlook Phishing Protection feature.