Please try Outdoor Trekker Pro for Windows Phone 7. It has everytrail built in and as many users attest, it's the most advanced gps trekker available on the windows Phone 7 to date. Even has voice, laps, photos, audio, facebook, dropbox, programmable events, gpx, kml, kmz, zip, html and csv exports. The list of features are remarkable.
You can download at the marketplacehttp://social.zune.net/redirect?type=ph ... 237de2db9e