Eidos and Crystal Dynamics have relased a 1 GB demo of one level of the newest of the Tomb Raider series, Tomb Raider Underworld which will be released on all platforms Nov 19th.
the demo can be dl here:
http://www.tombraiderchronicles.com/headlines3550.html
I am very impressed with the graphics and enhancements, and predict it will be another nice success for Eidos and the series.