My word of the day was Dictionary.com's word of the day on February 19, 2001. Lacuna is a fun word, but especially the plural, lacunae. I knew the word already, but saw it today while reading an editorial by Maureen Dowd:
[George W. Bush's] White House reminds me of the 1937 movie "Damsel in Distress," in which Fred Astaire has to frantically pirouette around Joan Fontaine to make up for the fact that she cannot dance.
Bush officials are always frantically pirouetting around W., making up for his stumbles and lacunae.