One of the best camera features that I love is: View on Map
It geotags your location and embeds it into the picture. With your GPS enabled, click on a pic in the gallery and then go click the BB button and view on map. Viola you get a location of your pic on a map!
Also, if you import the pic into Picasa on your computer and have Google Earth installed, it will map it out for you as well!
You can enable GeoTagging in the camera options and you will need to make sure "GPS Services" is set for "Location On" (Options -> Advanced Options -> GPS). When taking a picture, you know you have a GPS lock when the cross hairs icon turns white.