Joyce,
Have to agree. When I started the epublishing, my Amazon sales were awesome. But since the beginning of the summer, my sales have plummeted on Amazon, while they've nearly doubled on B&N.
That being said, I do mostly short stories as ebooks, because my novels are published through an actual publisher. I sell my stories for .99 cents and they sell really well. Unfortunately, I'm only making .35 cents per copy sold, which means I need to sell 3 books just to make $1. I still end up making a few hundred off of Amazon at the end of the month, but that's nothing compared to the couple thousand I'm getting from B&N.
However, whenever I've put any books up above .99 cents, I've seen the sales drop so low, I couldn't possibly hope to survive off them. So, I still with the 35% royalty.