It's basically an N9 altered for Windows phone 7.  Nokia have just announced the Lumia 800 and 710 at their Nokia World 2011 keynote, representing their first device on Microsoft's platform.  

If there's one thing we can take away from this, it's that Nokia still make (arguably) the best phone hardware on the market.  You've probably already seen the N9 on the high street; but without the cartoon OS that is Meego and the Metro UI bringing some grace to the display instead, it manages to accentuate just how beautiful the hardware truly is.