I have a first generation Kindle and absolutely love it.  I recently purchased a 16GB SDHC card for other purposes but decided to see if it works in my Kindle just for giggles.  I've read enough to know that anything above 2GB is hit or miss on the kindle so I was NOT holding my breath but amazingly.. it works!  16GB is a bit insane but for those of you hunting for a way to store ... I dont know ... a GAZILLION books on your kindle.. Here is the link on TigerDirect to the one I bought that works for me.  I make no promises as I don't know if it's a fluke or what, but good luck.