Location-sharing app Glympse is partnering with Gogo to allow you to checkin from the sky. The nice thing about this app though is that you specifically describe who you want to share your information with. The user puts in phone numbers of who they want to inform and then can even power down their device afterwards. Glympse then shows the recipient your status and location. The ETA is dynamically updated for the entire flight so the person picking you up doesn’t have to guess.
I’m not one for checking in and sharing my location but this seems like a useful tool for everyone. Plus, I do not have to share my info with everyone and their mother.