The HL2DB forums have a recap of a recent Half-Life 2 IRC chat event. Among the many things mentioned (and there's some good stuff), one of the Valve guys mentions the anti-aliasing problem which had so many people's panties in a twist, is now fixed. On all cards. So look forward to AA goodness. Thanks jd.
valve|gary: Anti-aliasing has been fixed for all cards
News source: Shacknews