2GB [1x2GB] RAM Memory Upgrade for the IBM Lenovo Thinkpad R61 and R61i Laptops | eBay
Lenovo ThinkPad R61i - iFixit
IBM Thinkpad T61 RAM Replacement - iFixit Repair Guide
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
Lenovo Thinkpad R61I Laptop Hard Drive Replacement - LaptopHDS.com