Google Cloud Messaging is, for those of you who don't know it, a free service that allows developers to send real time push notifications across different platforms, like Android, iOS, and Google Chrome. It is reliable, easy to implement both client and server sides, and it's fast.
So, while I was implementing GCM in a pet project of mine, it came to my mind that it could be useful for someone to have in their handheld device, or in their browser, real-time updates about what is happening in their team through their favorite DVC software.