I actually have a few SDIO devices sitting in front of me right now.
SanDisk Connect Wi-Fi 802.11b
Veo Photo Traveler
I used to use them with my Tapwave Zodiac 2. I might have to fiddle with them and see if I can see it at all in either of the Pandora's slots.
Unfortunately, both of my Pandoras are broken and sitting in a box until I can get parts for them. I don't want to damage them any further. My original CC case has disintegrated so badly that it won't hold the battery on the contacts and the key mat falls down through resulting in video issues - damaging what's left of the LDC cable. My #67 1Ghz has gone from PSOD through GSOD to BSOD to no video at all - internal LCD cable is toast.
The parts I need are never all in stock at the same time - can't fill a basket at the Dragon-Box shop. So, I have a big parts order request waiting in ED's in-box. Hopefully it will see the light of day soon. I'm tired of listening to music on my Galaxy Note II - the Pandora's sound is SOOOooo much better.
In the meantime, if someone is really really interested, promises to send them back unharmed, and can claim the knowledge to make them work, I could send one or both of these SDIO devices to them for testing with. That wouldn't get us to 'drivers for the 3g card' but it could at least do some basic SDIO testing to see if it's responding through the slot.