Dont suppose I can offer any more info than Eddie, but I did spend a weekend there in April, and would recommend the following:
Be wary of sitting down in bars, they charge you extra for it.
Dont get a taxi from the airport, it costs about 50 euros, you can get the train for about 10 euros each.
Use the metro, you can get a days pass for very little, and you can see most of Paris in one day