The NFC Forum has announced that UK payment card firm Barclaycard has joined the organisation as a sponsor member, the highest level of membership which entitles it to a seat on the organisation’s board.  Advertising agency Dentsu and Sequent Software, an NFC vendor, have joined as principle members. In addition,  a further 26 organisations have joined at lower membership levels including handset vendors HTC, Sharp and ZTE as well as Isis, the US mobile payments venture, and Obopay, the mobile payments technology firm.