Gizmodo got some leaked photos and specifications of a new ultra-light notebook from Lenovo dubbed Thinkpad X300.

Lenovo sticks to the established design language of the Thinkpad series with the X300. Actually it doesn't look much different from the trusty X20 I have had since 2004.
The new Thinkpad X300 would sport a 13.3 inch LED backlit screen, Intel Merom Santa Rosa Dual Core CPU (2.0 Ghz / 880 Mhz ), a 64 GB SSD and up to 4GB RAM. It would have an integrated ultra-thin DVD burner.
The measurements of the X300 would be 318x231x18.6-23.4mm and the weight is 1.13kg (2.5lbs). There is no information on when Lenovo would release the Thinkpad X300.
More details and photos on Gizmodo.