Board Express, Tapatalk for Windows Phone 7, is now available in both versions in the WP7 Marketplace! You can download both over your Windows Phone 7 Device or over the Zune Software.
Tapatalk for Windows Phone 7? Not exactly. But with Board Express you can access all forums which have the Tapatalk plugin installed. Board Express will be available on October 21st in the Zune and Windows Phone 7 Marketplace.