The emulator for Windows Phone 7 includes Internet Explorer so you can test your websites now to see how they are rendered on this device. The emulator gives you a lifesize rendition of the device screen so you can format your pages appropriately. To customise your site for this new device you’ll need to identify it when it hits your server so here are the key facts:-
User-Agent: Mozilla/4.0 (compatible; MSIE 7.0; Windows Phone OS 7.0; Trident/3.1; IEMobile/7.0)
I’ve highlighted the items which indicate the platform and the browser. The browser also sends the UA-pixels header which describes the screen. On the emulator this is 480×800 (regardless of the screen orientation in use at the time) and it has been announced that there will also be devices using 320×480 (HVGA)
In The Hand Ltd 