Television is in the blood for this week's Celebrity Geek Jon Bentley. He presents Channel 5's Gadget Show, where he reviews the latest techno toys in his own inimitable style.
He used to be in charge of BBC's Top Gear, where he unleashed Jeremy Clarkson on an unsuspecting nation. But did you know he started in the industry when he was 10 years old? Well, he had his own TV repair business, anyway.
Click play on the video to find out what makes Jon tick. Is he a Mac or a PC man? What gadget would he save from a burning building? And would he rather have the latest Samsung Galaxy phone now or wait for a universal translation device to be invented?
Jon was in town talking about a new study commissioned by online backup company Mozy. Apparently we're all moving our lives online in record numbers. Activities such as printing photos, visiting travel agents and writing down phone numbers will soon seem as archaic as burning witches or leech therapy.
Forty per cent of people surveyed by Mozy said they no longer print photos, more than half no longer go into the travel agent, while a similar amount said they no longer ring the cinema to find out times. A third no longer use a physical address book; just under a third don't use paper maps, and 45 per cent no longer dial directory enquiries or use public telephones.
More than a quarter have stopped using telephone directories or yellow pages, nearly 30 per cent don't use dictionaries and over 30 per cent don't own an encyclopedia.
You can hear Jon talking about his take on our online migration on this week's podcast.
Which sleb do you suspect of being a secret nerd? Let us know in the comments below or on our Facebook page, and we'll do our best to track them down.