Comments: Using OpenSegment

Which type of Arduino board should I use with this device. The docs suggest 'Little Arduino 328 @ 8Mhz' which isn't an option on the Arduino 1.0.5 IDE on my Mac. A little precision in the description would be appreciated. I have it hooked up but can't reprogram the sketch on it.

I have a couple of these and wanted to utilize them in my R2-D2. They have a wonderful level of color and I want that on the inside of the body. Initially i wanted to use them for voltage display but I understand that it will not work on a 12v battery, as a meter. So question,

  Can it be used to log time of use?  I.e. it starts counting when I power up my R2, then pause when R2 is turned off, then continue where it left off, etc. until i reset counter.

*I am starting to implement i2c in some of the electronics inside of R2. I would like to understand how I can utilize the open segment for more than just a clock :)

I've been using one of these with a Raspberry Pi reliably via UART for a couple of weeks. Suddenly, it will start with the customary '1234' but will immediately display '0000', and nothing else. I've read that there was an SPI bug in previous versions that would cause this to happen. Could that be happening here? No amount of serial commands will get it to display anything but '0000'.

Very nice component. How can I change the default l2C address? I need to pilot 2 display at the same time.