I discovered
manybooks.net yesterday and have loaded onto my Nook free books by Jane Austen, Lucy Maud Montgomery, Louisa May Alcott, Rafael Sabatini, Robert Louis Stevenson, Charles Dickens, the Brontë sisters, Fanny Burney, George Eliot, Alexandre Duma, père, and, ahem, Baroness Emmuska Orczy (talk about guilty pleasures). W00t!
I'm just loving my Nook. I was worried about cost when I got it for Christmas, but it's been a lot more economical than I was afraid it would be. I've bought less than half a dozen books to load on it, but I've read probably close to seventy books on it. I've downloaded dozens from the library. That's a great perk: you download a book and then you have the right to read it for three weeks, and you don't ever get any overdue fines. And wow, I didn't find out until this week that Barnes & Noble offers a free book for download every Friday. Yes! And I love the free web browsing I can do with it when I'm out at a coffeeshop, since I don't have a laptop (although keyboard input is slow and not ideal).
I wish it could download and use applications, since I don't have a smart phone. Maybe that will come someday with a software upgrade? I can hope.