IMS Research say sometime this month the 5 billionth device will plug into the Internet and are forcasting over 22 billion connected deivices by 2020.
Today over 1 billion computers worldwide are regularly connected to the Internet and this number is steadily growing.
The second wave of growth has and is being driven by the mobile phone industry, and the global number of Internet connected phones has now surpassed the number of connected computers. The number of phones is still growing at a much faster rate.
The study adds in emerging Internet connected device sectors such as tablets, netbooks, eBook readers, Internet TVs, digital picture frames, cameras, etc., and reaches 5 billion connected devices.
Pingdom had some interesting statistics in a report on the size of the Internet last year.