Ecorio was one of the Android applications shown off at the T-Mobile G1 event. The app tracks “your mobile carbon footprint” and is one of the winners in the Google Android Developer Challenge.

Interface

Ecorio has a very easy and simple interface. The home screen shows your travel carbon footprint, displays some shortcuts and the four main features at the bottom of the screen (Start, Reduce, Inspire, and Offset). The application runs in the background and tracks your trips. There are no features hidden in a submenu of a menu. The entire application is laid out cleanly.

Inspire: Ecorio’s social network

“Inspire” is the cool social networking feature of Ecorio. This is the kind of thing where a social network makes a lot of sense. You can see how others are reducing their carbon footprint and put together a carpool using the Inspire feature.

Find out more about Ecorio after the jump!

If you missed it, Google had a tiny announcement with T-Mobile and HTC today introducing the first Google Android phone, the G1. See all of our Android coverage here. Google also announced Google Transit. To mark this occasion, they invaded New York’s Grand Central Terminal with giant lighted markers and also placed kiosks to demo the new feature of Google Maps.

However, there was something strange. The kiosk had a large display mirroring a laptop, but wait, is that a Verizon EVDO card? Yes! Google is already in bed with another mobile company hours after announcing its commitment to T-Mobile. T-Mobile has asked Google to sleep on the couch and feels hurt since Google knew that T-Mobile did not offer EVDO cards when they got together.

More pics of Google invading Grand Central Terminal after the break.