Went to Circuit City today looking for something small to leave in the USB port on my 08 MCS, and found this:
http://www.sandisk.com/Products/Prod...o.aspx?ID=2630
It's a microcard that fits into a small (about 1" long) USB device. Plugged into the slot on the car, you can't hardly tell that it is there. Very unobtrusive as far as putting other stuff into the cubby, not readily visible to prying eyes, and works great. Even better, it was on sale for about $30 off.
It is exactly what I was looking for.

 

Neat looking little device. but $30.00 off brought it to what kind of price.

I can not find it on the Circuit City web site. Do you have a par number?

 

Hopefully $30 off means $30 off the standard street price of $70. But really I hope you didn't pay more than $30. If so there are some much better options out there:

http://www.newegg.com/Product/Produc...82E16820211279

http://www.newegg.com/Product/Produc...82E16820609296