My electronic ones expire in November 2010, which coincides with one year from when I hit PM. The purely non-scientific method of matching up some of the expiration dates people mentioned with their current status (i.e. if you've said your eCerts expire today or next month and your profile on FT says DM meaning you achieved PM early in the year) leads me to think that the electronic system is setting the eCerts to expire one year from the day status was achieved rather than at the end of the qualification year in Feb 2011.
Just my observation. I almost always fly sLUT fares anyway, the expiration date is moot to me personally.