If you've been thinking about picking up a copy of the TidBITS Archive CD [1], I encourage you to act soon, because the $29.95 introductory offer expires 31-Jan-07, and the price will be going up to $49.95 after that. For details of what's included, see "Introducing the TidBITS Archive CD [2]" (2007-01-08).
[1]: http://www.tidbits.com/cd/
[2]: http://db.tidbits.com/article/8797