Best Buy: Lenovo 12" ThinkPad Notebook 2 GB Memory 80 GB Hard Drive Black X61-2.0C2-2-80-X-7P64
ThinkPad X series - Wikipedia
2GB Memory RAM Upgrade for the Lenovo Thinkpad R61 Series, T60 Series, T61 Series, X60 Series and X61 Series Laptops (DDR2-667, PC2-5300, SODIMM) at Amazon.com