SD Data Logger
Serial interface allows your Basic Stamp(r) or other microcontroller to read and write data to files on an SD media card. Price: $69.95

The SD Data Logger allows any microcontroller that can send and receive serial data to create files on SD media cards that can be read and written by a PC with a SD card reader. The module allows you to store up to 32 megabytes of data on each media card. It allows each media card to contain up to 16 files each. And each file may be up to 16 megabytes in size. By creating comma delimited files you can open your data directly with Microsoft Excel to manipulate the data or create charts and graphs.