Your question seems a little vague. Are you referring to the various low cost alternatives to Sony's SxS Pro memory cards? You can purchase a number of secure digital adapters that fit into the EX camera's SxS slots with SD cards in turn fitted inside the end of the adapters.
There are actually quite a few of us around here who use these...
Not all SDHC cards seem to be created equal and you need to allow the camera a second or two more to conclude recording after you've hit the button...overcranking is the limitation...otherwise, nothing "shady" about it.
I actually haven't recorded on the included SxS card yet...I've been using SDHC cards with the MxM adapter.