Also, those Express Cards such as you see at http://en.wikipedia.org/wiki/ExpressCard often require their own drivers so no, it's rarely automatic. Always check the maker of the card reader and the card to find drivers.
I just built my own desktop, with the specific purpose of using it to run audio software. Everything is working like a dream, all of my hardware is working, CPU and RAM are great etc.
Before, I'd been using an express card on my laptop to read my firewire device. It's a high-end express card, so I figured I would like to use it on my desktop. I bought a PCIe card capable of reading express cards and installed it. It is, however, not reading my interface. Or my software isn't reading my interface etc. Before I go into troubleshooting for my interface, I would like to make sure that my PCIe device is not the issue. Where can I tell if my mobo is reading my PCIe device? I'm having trouble figuring out what it would be in Device Manager (running windows 7).