Cypress’ application note on smart E-Meters and why its more advantageous to use F-RAM over conventional EEPROMs.
This application note provides an overview of a smart electricity meter, or Smart E-Meter, and explains the benefits of using nonvolatile serial F-RAM rather than EEPROM in Smart E-Meter designs.
TI currently have a promotion on their MSP-EXP430FR5739 F-RAM dev board,it’s more than 50% off:
http://e2e.ti.com/blogs_/b/msp430blog/archive/2013/12/17/get-a-chronos-for-christmas-or-an-fram-experimenter-39-s-board.aspx