I am having the same issues and I cannot get any more 2GB SD cards in south africa. The only 2GB's that I can get is very expensive and have to import many to secure an order.
I tried a 4 and 8 but it just does not read. What is the status of this issue, can anybody recommend a work around to perhaps get the 4 or 8 Gb working?
Please, I am desperate. My company is growing and I now have 15 units running in production at various places in SA. I now need to deploy an additional 10 and only have 7 cards left....
Just as a note or comment, I LOVE this little product and it is working really really well under adverse conditions such as high temperatures.