I almost forgot to mention that I discovered today that the Mint is embarking on yet another of its periodic Don Quixote-like attempts to tilt at the windmill of the American reluctance to use dollar coins (which I totally don't get. They're so much more convenient than bills!)
They're gold again (love the fact that you can talk about American coins in terms of copper, silver and gold pieces), with presidents on them--the ones I got all have John Quincey Adams. The reverse has an image of the Statue of Liberty; the E pluribus unum, In God we trust, and mint mark are all on the edge in lieu of milling. I do wonder if the shiny gold finish will last longer on these than it did on the Sacagawea coins, but for the moment I rather like the implementation.