During the Android 4.0 Ice Cream Sandwich demo we got to see another use for NFC. Beam, demonstrated sharing of information across devices and it looks like Google has now updated Google Maps to support the feature. You won't find it listed in the change logs though. In fact, the change log only states the update has reduced file sizes for app storage on different devices but the permissions tell the truth. New permissions requested are for NFC and when you put the pieces together, its safe to assume Beam support has been added to Google Maps.