It's almost as if your device isn't real until you get a Kindle application on it. And if you believe that, then it looks like today Windows Phone 7 devices just became real as the MarketPlace now sports the Kindle app for reading e-books. As of now, the Kindle app for WP7 is the first e-reading app on the device, and what a good one it is with over 775,000 titles to choose from.
To be honest, this story is more about Amazon and how they are dominating the e-book market right now by making their reader and books available on any device. Not only that, but reading Kindle books from device to device is really as easy as it gets with the Kindle's Whisper Sync technology allowing you to pick up right where you left off on any device. In fact, I have personally switched solely to buying books through the Kindle store because of the crossplatform goodness. I'm glad that Windows Phone 7 is on the list now so when a device hits Verizon I don't have a choice other that to purchase one.
So, if you are a reader and have a WP7 device, head on over the MarketPlace and pick up the free Kindle app.