I've been looking around for a Smart Card reader that works with OS X and the MBP. I can find USB based ones, but I'd like one that could go in the ExpressCard slot, as I would never use it otherwise.

Trascend has just upgraded to 32GB their Solid State Drive for ExpressCard/34 slots. It will accelerate your laptop PC using Vista’s Ready Boost, but it’s also compatible with Linux and Mac OS X, ...

I have a 17" MBP with an ExpressCard 34 slot. Has anyone found a useful device to put in there? eSATA and USB are common, serial ports etc. less so. I was going to buy a memcard reader. (sd, cf, ...