An interesting comparison of Digital Spilt scattered over world – the graph between World Population and Internet Usage which is updated regularly. Here go the words from original post –
Internet Usage and World Population Statistics are based on data compiled by AMD, primarily using statistics published by Internet World Stats, which obtains data from Nielsen//NetRatings, the International Telecommunications Union, by local NICs, and by other reliable sources. For more information, see the Internet World Stats Site Surfing Guide. The Statistics presented by AMD are estimates only and do not reflect exact figures. Statistics may be updated periodically by AMD as additional data becomes available.