Website E3 Insider has posted an article regarding the Spore presentations at the E3. It explains the basics of the game once again, but no real new information is added. It once again points out that anything is customisable, including the planets, and that other people's content is downloaded so you can manipulate their stuff, while not affecting the other player's game directly, as if it's all in a "parallel universe." The article itself has more details.