X-23 is starting to show up on ebay from sellers in China. This usually means the figure is roughly a month and a half or less ready to start hitting store shelves.
Here's the auction. Don't worry, it's nearly time it'll hit store shelves where you'll only have to pay 7.99 if you're in the states, or whatever your normal local stores' prices are.
Special thanks goes out to AndyCR75 of Toyark for the heads up.