Gen Con and VaViaz have whipped up a cool and free Gen Con app (link takes you to iTunes store) for the iPhone and iPod touch. It has maps of the local area and hotels, plus all sorts of searchable events information. It downloads the info and stores it locally, so you can use it even if you have data turned off on your iPhone. There are a bunch of interactive features as well, as it hooks into Twitter and Facebook. I've only spent about 10 minutes goofing around with it, but it looks pretty cool. Just having the maps at hand all the time will be nice!