Debian team is infamous for sticking to hard to remember names for each of its releases. Thankfully, they have stuck to one theme while naming the distribution releases - that of the "Toy Story" movie. Each release is named after a character in the Toy Story movie.
So you have Sid, Lenny, Etch, Sarge, Woody, Potato and so on. The following is the explanation given by the Debian team regarding these names. So now with the impending official release of Lenny as a stable version, it is now the turn of the next build of Debian in Sid to be promoted to Testing and it has been named Squeeze (after the three-eyed monster in Toy Story).
Read the official Debian announcement to know more.
