Lisbon Treaty for Dummies

People keep rattling on about the Lisbon Treaty so I thought I would find out about it. The first lesson I learned was not to start at Wikipedia. Even the summary section confused and frightened me. I need Lisbon Treaty for Dummies. The BBC has a more accessible Q&A but the thing still eluded my grasp. It defeats me how the Lisbon Treaty can be such a hot political issue when there are probably only a handful of people in the world who know what is in it.