As first reported by FIFA08news.com and since confirmed by EA in their official forums, the demo for FIFA 08 should be out on Thursday September 13th. It will be available for both the Xbox 360 and the PS3. The details of what the demo will include such as the teams available for use, length of play, and game modes are unknown.
Also yesterday the 360 achievement list came out. You can view it here. There are 49 achievements amounting to the 1000 points.