On April 8th, just six days after the iPad went on sale, we ran a post writing that Chitika Labs (who had been tracking iPad sales by counting cookies of new iPads hitting the Internet) claimed that Apple had sold 564,257 units. The method used is admittedly not the best of all possible metrics, but it does provide an indication of how many new iPads were leaving the shelves. Today, 15 days later, Chitika reported that over 1,000,000 iPads have been sold. They also claim that over 32,000 new iPads were seen on the Internet today, representing 4% of all total iPad sales.
Thanks to TUAW reader "xamevou" for sending this in.