Ign article says two sites list these as the contents of the package.
Half-Life 2 on DVD-ROM
Counter-Strike: Source - The next generation of the #1 online action game
Half-Life: Source - Digitally remastered version of the original acclaimed PC game
Free Limited Edition T-shirt - Offered in men's size XL only
Half-Life 2 Prima Book - Information on character backgrounds, the making of the game, and more than 100 pieces of artwork
Looks like it may be worth it if I can find it around $60. I may wait for a price drop on that before buying the normal package on day.