Can anyone give me a quick run down on what Civ IV is about and involves?
This is what wikipedia says about it,
Civilization IV is a turn-based game in which the player builds an empire from scratch. All standard full-length games begin in 4000 BC with a settler that builds a single city. From there, the player expands an empire while contending with rival nations, utilizing the geography, developing infrastructure, and encouraging scientific and cultural progress.
Just be careful you don't lose huge amounts of your life to it.