Came across this a bit ago and was questioning it. Is it even viable? If so, what could possibly be used with this? All PCIe cards? or limited to certain cards like wireless adapters? Not necessarily questioning this certain brand, but the practice overall.
http://www.amfeltec.com/products/flexible-minipci-to-minipcie-adapter.php
http://www.amfeltec.com/products/flexible-minipci-to-minipcie-adapter.php