The black leather Moto 360 is currently up on the U.S. Play Store, though it probably won't last long. After going out of stock pretty much immediately at launch several days ago, it is already listed as shipping September 22nd, a full two weeks from now. The gray leather variant remains out of stock.
Update 1:55pm PT: Aaaand it's gone.
The Moto 360 has been in high demand, though some early reviews indicate poor performance and battery life, especially with the ambient display setting turned on (we're talking having trouble getting through a single day without recharging).
Black Leather Moto 360 Back In Stock On Google Play, But Shipping Already Delayed Two Weeks [Update: Gone] was written by the awesome team at Android Police.