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www.seeedstudio.com]
This is not going to line my pockets, I just saw the ad and thought I'd pass it on. I haven't even done business with the company.
It looks like Seed Depot is closing out on the 1.1v Seeeduino Mega boards (which are Arduino Mega compatible). The board I've got is the current 1.22v. If comments at the linked post are to believed, the difference between 1.1 and 1.22 is that you can't run it on 3.3 volts, and the auto-switching voltage feature was added on the 1.22 versions. I assume that means that you are stuck at 5 volts, which does not look like a hardship for a Reprap.