Seriously this a deal breaker to me.
I know that SD-USB converter might be the solution for this one.
From what I found SD cards require 3.3v to run (2.7~3.6v is also possible) and USB requires at lest 4.75V. Which might be a problem here. Anyway to make a converter it might work with connecting a usb pins to the following
microSD-=-USB
Pin---Pin
1
2
3--->2*
4--->1
5
6--->4
7--->3*
8

Now we want someone to sacrifice his microSD + USB device (his usb stick?) + card-reader/laptop/n900/mobile to see if its going to work :P
Before going a head I have to warn you that I didn't know which pin to which it should be connected in the case of (7&3)* One suppose to be Data in and other Data-out. I think someone who is into DIY or in electric can do it in the right way. I should also include that you shouldn't try this with with any important data in your usb stick. The worse case it might not work or you just burned it out.

For electric guys check this out

USB Pinout:
http://pinouts.ru/Slots/USB_pinout.shtml
SD (microsd):
http://www.chlazza.net/sdcardinfo.html
http://www.pqi.com.tw/upload/downloa...xxx%20VA.1.pdf
(In the following link it shows to how to connect a miniSD to microSD)
http://www.planetmobile.it/jumpjack/...inout-eng.html