OLPC Little Green Machines!

From http://en.flossmanuals.net/XO/Maintenance

Maintenance of the XO hardware involves updating the software and firmware and keeping the case in working order.

To update the Sugar software or Activities that run on the XO laptop, refer to the update information for software update at http://wiki.laptop.org/go/Olpc-update. You might want to update all the software on your XO laptop when a new version of the software is released. It takes about 30 minutes, and you can use the instructions there to install all new updates without losing any data. Refer to the "Latest Releases" section of http://wiki.laptop.org for the most recent version number and information about updates and reasons for updating.

Updating your XO to the latest firmware version

Typically separate Open Firmware (OFW) updates are not neccesary because the software will contain the needed firmware updates.

However, you can update the OFW by following the instructions onhttp://wiki.laptop.org/go/Upgrading_Firmware.