Thank you all for your honesty. It's nice to know I'm not alone. My ebook library is currently around 2,000 items. I've bought the vast majority of those (1392 at fictionwise, 700 or so at webscription.net, a few elsewhere). I've read about 1600 of them.
And that's not counting the free classics downloaded from here and elsewhere, of which I've read less than 50, I think.
I've now been purchase free for three days...