It's also useful for sending status updates, like "watching TV" or "checking into the 40 meter net."
or... sending local club meeting info or local repeater info so that travelers passing through might find a IRLP or Echo link reapeater. There are many more uses like during a bike or marathon race, you could have it in the drag vehicle and see where it it is. I just returned from a trip to N.J. and was pinging my location to and from (AZ to N.J and back) so my family could see where I was. They think it is real cool to see that on a computer screen.
If you check out wb4apr's pages you will find out so many uses.
73 de wn2c Rick