Dezeen Wire: Vienna Design Week is underway and Dezeen are covering the festival live from Vienna. Highlights include a machine that draws Spirograph-style patterns in quartz sand by Philippe Malouin, a collaboration between Tomas Alonso and one of the city's oldest silver companies and a wooden treehouse by Konstantin Schmolzer that's constructed alongside the vertical garden inside Jean Nouvel's Sofitel hotel.
Austrian designer Thomas Feichtner has been awarded the National Design Prize 2011 for product design and presents a chair with a seat suspended at the centre of a cubic oak frame. Watch a movie about it's manufacture on Dezeen Screen.
Speakers at a series of talks on the theme of Change includes writer and critic Sophie Lovell, founder of Cape Town media company Interactive Africa Ravi Naidoo, London designers Doshi Levien and Berlin designer Jerszy Seymour.