If something was made with SD2.0 spec. then it HAS to support 32GB regardless. Technically if you find a product that doesn't support it you can sue the company that made it I believe. It's all in the software/firmware, even between SD1.0 and SD2.0/SDHC.
I have not found a product made with SD2.0 spec. that doesn't support 32GB or 16GB microSDHC yet. It doesn't matter what the product page says.
SDXC is a totally different beast I think.