I just purchased a USB 2 cardbus for my IBM R30 Laptop. It is based on the NEC upd720100 chipset.
It installed ok, however I cannot get it to work with two USB devices that I have. The first is a SanDisk Mini Cruzer. The second is a SanDisk 6 in 1 Imagemate Card reader.
I have a lexar USB key, a portable hard drive and a Edirol midi device that all work fine - it's only the SanDisk stuff that doesn't work.
The Mini Cruzer's light comes on, but windows simply doesn't recognise its there (no popup to say a new device is connected, and no new drives in My computer). The light on the Imagemate doesn't light at all when plugged in. Both devices work fine with the existing USB 1.1 ports on the laptop, just not with the new USB 2 ports.
The main reason I bought the USB 2 ports was for downloading compact flash cards in the field (I'm a photographer) and transferring 1G and 2G cards at USB 1.1 speed is painfully slow. It's just my like that all of my stuff works with the exception of the CF card reader I have.
I tried plugging the devices in to the USB 1.1 ports, then uninstalling them in the Device manager and then plugging them into the USB 2 port with the hope they'd reinstall. No luck though.