Getting between buildings in Vegas is fairly straightforward. It's once you're inside that things get confusing. If you happen to be in Nevada for CES this year - or just want to gaze over the maze that is Vegas' hotels and convention centres - Google Maps has launched indoor mapping of the event.
The show floor has been included, and according to Slashgear, can even be saved to the cache so you don't need a data connection to keep the map handy. Given the massive size of CES every year, this is going to be an essential part of your arsenal if you are planning on pounding the show floor.