Long Zheng has taken some photos of the latest Windows Phone 7 builds showing up at TechEd 2010. You’ll notice a few minor changes, such as smaller type on the lock screen in order to accomodate longer dates as well as some new icons in the live tiles to go along with the Metro theme a little better. Long Zheng also notes that the builds appear to be very responsive and complete, implying a release to manufacturing very soon.