After an incredibly brief (1 day!) beta period, it looks as though library lending for the Kindle is now live in 11,000 libraries across the nation.
Sorry, other countries. You lose again.
We’ve not really had a chance to try this out, yet, so we can’t say whether the experience is good, great, or awful. We suspect your mileage may vary, depending on your local library’s specific OverDrive implementation. (Let us know your experiences.)