> I make a number of foods with egg yolks.  I'd really like to keep the
whites for later consumption.  Does anybody know how long egg whites will
last in a refrigerated, sealed container?

According to the CFIA (Canadian Food Inspection Agency), use cooked egg
whites within 4 days.
www.inspection.gc.ca/english/corpaffr/foodfacts/eggtipse.shtml

The FDA recommends use of cooked eggs stored in the refrigerator within 1
week.
http://vm.cfsan.fda.gov/~dms/fs-eggs.html

These guidelines are likely based more on food quality than food safety
concerns because virtually all pathogens appreciably stop growing below 4C
(40F).

Rob