Sounds useful. Some non-consumer examples off the top of my head are:
-search and rescue missions. Track the location of each person as they search and figure out what parts of the geography have been covered.
-trucking companies. They spend a lot on GPS navigation systems; perhaps you can offer a cheaper alternative?<p>Also, it only works on android 4.0+? Is that necessary? I got 2.6 :(
Maybe I'm unimaginative, but why would I use this? I'd like to see an example or three of why this app is cool. The only thing I can think of is if you're going to go meet someone, but this idea isn't fleshed out on the site.
The rising prevalence of youths who have smart phones makes location sharing apps like this a great tool for parents letting their kids be more independent. That's just one use of this app that I can think of. Several other commenters here have already pointed out great uses: caravans, search and rescue coverage, etc. so I will not try to add on to that. Overall, it's well made and deserves to become a staple tool for live location sharing.
my first impression: useless.<p>my second impression, mail a link to someone who wants to know where i am and how long i'm going to wait there. awesome.<p>i like it. straight to the point and neat. could i have built it myself? definitely. do i want to build it myself? most definitely not.
you are welcome to check-out Geo Messages: <a href="http://www.servletsuite.com/geomessage/" rel="nofollow">http://www.servletsuite.com/geomessage/</a>