More than 100 million users are on Pinterest, the online bulletin board-style service which allows people to "pin" images based on their interests, the California company has said.<br />Co-founder Evan Sharp told AFP that most of the users "are not just visiting Pinterest once a month, but they're actually discovering something so interesting that they're saving it or are clicking through to the website."<br />The number of Pinterest queries is now estimated to be more than 1.5 billion per month, according to the company, which is seeing its strongest growth globally, with some 45% of users outside the US market.<br />Pinterest, whose valuation has jumped to $11 billion, employs 500 people and has recently opened offices in Paris, Berlin, Tokyo and Sao Paulo.