The 2-of-3 multisig cold wallet I think is a brilliant idea (for multiple reasons). I hope devans is doing something similar on bustabit. If devans hasn't already revealed a basic overview of how he handles bustabit's cold wallet (I assume RHavar would've known otherwise) I'd be interested in knowing for peace-of-mind reasons. I assumed bit/dice both used the same multisig cold wallet storage techniques, but if devans has a superior way of doing it, don't know why he wouldn't use whatever is the safest, most secure option on both sites.