New Technology Advances for Civilization 4

Caffeine
Benefits: Discovery of Caffeine allows the use of Tea and Coffee resource tiles. A city with either Tea or Coffee in its resource box receives a 10% bonus on Science Research. If the Tea or Coffee is removed from the resource box the city has 3 additional unhappy citizens until it becomes available again.
Prerequisites: None
Allows: Energy Drinks (with Mass Production)

Missle Defense System
Benefits: None.
Prerequisites: Ballistics, Deficit Spending
Allows: International Treaty Withdrawel

Electronic Voting Machines
Benefits: Democracy government types no longer have to worry about any executive decisions (Declaring War, Canceling Trade Agreements, etc) being cancelled by a popular or Senate vote.
Prerequisites: Espionage, Megacorporations
Allows: Democratic Fascism (with PATRIOT Legislation)

Pornography
Benefits: Unlocking the principles of Pornography makes 50% of your Unhappy citizens Content, in every city of your Civilization. This advance does make the Great Wonder: Woman's Suffrage take 5 times longer to build, however.
Prerequisites: Photography, Capitalism
Allows: Pr0n (with The Internet)
Great Wonder: Free Internet Pr0n! (Completion of this great wonder halts your civilizations population growth completely.)