I'm not sure how much of our game will take place in Sharn, but this could prove to be a useful post to the blog if we spend any significant amount of time there.
Below are two links. The first is to the Sharn entry on the Eberron Wiki. The second is to the Sharn: City of Towers map gallery on the Wizards site. This should be helpful for anyone who doesn't have the Sharn book or PDF. It should also be helpful if you need to look something up quickly at work.
Sharn (Eberron Wiki)
Sharn (Map Gallery)