Since 2009, OLPC Greece has provided one laptop per child in 35 classes and groups around the country. 580 XOs in all, with the inolvement of many teachers. They have kept us updated via our wiki and regular emails, and shared some interesting work from their students.
My favorite post is from the 3rd graders at the Sminthi School — they made large tiles of stencil art, rearranged it on a school wall, and turned it into stop-motion animations with Scratch (video). Their professors Psychogios, Rigas, and Aspioti, brought this work into with their math, informatics, and art classes.
Recently the OLPC Greece team published a short summary of their work from the first two years, and their goals for the coming year. They note the need for local hardware labs, software updates, and technical support. You can follow their work, in Greek, on the public mailing list for the pilot. (An excellent practice!)