The methods that your referring to are all pretty slow - physically moving the card, wi-fi, etc. Why don't you use a camera that supports remote capture? The capability is on a number of P&S as well as dSLRs. It eliminates the time necessary to write to the card, then read back from the card, then transfer out of the camera, i.e., just the direct transfer. It's still relatively slow, but.....
http://software.canon-europe.com/sof...449.asp?model=
http://www.breezesys.com/DSLRRemotePro/index.htm
Also, there are the usb web cams attached to a laptop that may be useful.
Another idea is something like the eee PC (or other similiar nettop unit from a variety of vendors) that has a web camera (just a usb cam attached to an initernal port) built in along with the software. Its cheap - $400 - which includes the laptop, camera and software. Plus its rather fast. For full motion video, its jerkey and has latency, but for your use from what I understand, it may work.
http://www.buy.com/prod/asus-eee-pc-...208017730.html
hope that helps...