Every Windows Phone 7 user will get access to a free site called Windows Phone Live. It'll be a portal to your phone in the cloud, a place to do everything from viewing uploaded media to remote wiping your phone.
We don't have a ton of information yet on the Windows Phone Live site (sorry, not even pretty pictures!). But here are the key features Microsoft has mentioned thus far:
• View published photos (and videos?) • Look up Windows Live calendar and contacts • Exchange OneNote files (and other phone/web data) • Find My Phone (map, ring, lock and erase your phone from the web) • 25GB of storage