Adorama.com now has Sony RX1R in stock and shipping, other store like Amazon.com and B&H Photo Video are both shipping soon.
Buy Sony RX1R in US/CA: Adorama, Amazon.com, B&H Photo Video, Sony US, Sony Canada
In Europe at Sony Deutschland, Amazon Deutschland, Sony France, Sony Italy, Sony Netherland, Sony Belgium, Sony Austria, Sony Sweden, Sony Finland, Sony Spain.
In Japan: Amazon.co.jp