AFAIK, and I have confirmed this from testing and using them, mini-sd to sd adapters and there kin are just pin-converters, mapping from small to large. As SD and SDHC are pin-compatible, there are no reasons why there should need to be different adapters. I have even used an 8gb micro-sdhc card in a mini-sd adapter in a fullsize adapter, in my n800 (although it was temperamental, I think the mini adapter is cr4p).