The PCMCIA to USB device was found here... http://www.amtron.com/adapter/upisdma.htm
As you mentioned, the PCMCIA cards with USB jacks are popular for laptops. It's been a challenge to find the "opposite". It looks however like this can be used in a "PC mode".
I currently have an E series PCI card, which I'd like to replace with something smaller and/or external. Data acquisiton will still be through a PC using LabView.
The USB devices would seem to be a good alternative, however, upon browsing the boards here, it looks like some have had some troubles using DAQmx Base.
I was looking at the PCMCIA as an alternative, as I've used them in labtop acquisition settings before. The challenge here has been implementing this in a PC environment. The PCMCIA slots via PCI defeat my initial purpose, which is why I thought about trying to find a PCMCIA/USB adapter. However, if I'm going to do that...why not just go with a USB device? The only 'pro' for the PCMCIA cards right now is simply my previous familiarity with them.
Options options options!
Perhaps you can squelch my concerns about DAQmx Base? My experience has been mostly with Traditional DAQ, with a bit of DAQmx.