Today's deal at woot.com is a class 10 64GB SDXC card for $49.99. I just ordered three (the maximum you can get with this deal).
Edit: I just noticed that this card is "SDXC" rather than "SDHC". I'm googling this to find out what that means and if it will be compatible with my camera and Zoom audio recorder.
Well it looks like my Nikon D5100 is compatible with SDXC cards (whew!). I don't know about the Zoom audio recorder. The camera is what I wanted them for though.
Just got the three cards today. They seem to work just fine in my Nikon camera. Just amazing. 64GB on one card! I think I could do a week long shoot and only change batteries!
I just got my 2 today. I've got 2 cards on my Panny AC130 - the display tells me 13 hr 39 min of storage available- at full quality. Woo Hoo! Now, when will we see fuel cells for camcorders? [grin]