Tom's Hardware took a look at the sales of the Ryzen lineup and concludes the first batch is starting to sell out. The Ryzen 7 1800X is currently sold out at Newegg but new stock is expected by March 3. The other two models are still available for pre-order.
It's the same story at Amazon, the Ryzen 7 1700 and Ryzen 7 1700X are still available but the 1800X is sold out. Some smaller third-party shops are still selling it via the Amazon platform but they charge at least $150 more than the MSRP.
Other places like NCIX, TigerDirect, Fry's and MicroCenter are still taking pre-orders.
In Europe we can see that places like Caseking still have the 1800X available for pre-order but its British counterpart OCUK lists an ETA of March 8, 2017. Alternate.de promises a March 3-4 delivery and MindFactory still has it available for pre-order with a March 2nd availability.
One of the interesting things about MindFactory is that this shop lists how many items they've sold and it reveals there's an inverse correlation between the price of the chip and the number of pre-orders. The Ryzen 7 1800X scored "over 130" pre-orders at this German shop, versus "over 90" for the 1700X and "over 70" for the 1700.