According to research done by Chitika Labs, over one million iPads have been sold in three weeks. The firm computed this by checking to see how many iPads are coming through their advertising network and multiplying it by the total traffic of the Internet.
This survey method of determination would say that the original sell rate of the iPad, which saw a half million sold during the first week, has halved in the following two weeks, though it is still selling at a good clip. If this keeps up, and with iPad launches in other countries yet to come, Apple may yet sell several million iPads in 2010.
Source: ZDNet {link no longer active}
