It's easy to love MapBox for the way they push geospatial innovation. Last week they introduced MapBox Satellite.
What it is? "We’ve been working hard to bring MapBox users a fast, beautiful satellite and aerial imagery layer that integrates seamlessly with MapBox Streets and custom overlays. We’re happy to announce that it’s available today and included in MapBox Basic plans and above.
We are approaching MapBox Satellite in three main phases. Today marks Phase 1 completion with full world coverage to zoom 12 and full U.S. aerial coverage to zoom 17. Phase 2 will arrive in early 2013 as we deploy full U.S. and Europe coverage to zoom 18, followed by an aggressive Phase 3 rollout schedule for the rest of the world to zoom 17 during the first half of 2013."
Here's a really nice entry named Open Aerial: The Data Behind MapBox Satellite: "MapBox Satellite is powered by raw imagery from multiple sources that is then processed by MapBox using open source tools. All the data you're about to see is free, open, and if you're a U.S. taxpayer, available thanks to you."