Microsoft Phone UI from Techspot on Vimeo.

If you want to experience the features first hand, as I did in all these screenshots, first install the required developer tools to get the emulator. After you're all set up, download the .BIN file from here and then follow the instructions posted at XDA-developers to unlock the emulator. It’s still an early build of WP7S, but it should be interesting to poke around and explore. You can interact with the live tiles, check out the hubs, fumble around with the elusive voice search feature, and even use basic apps that are preloaded.