For the first time, New Zealand and Australia's glass societies are holding a combined conference - and Whanganui, this country's glass art hub, is hosting it. The CoLab (short for Collaboration) conference has brought together more than 150 delegates from around the world, and glass artists from the both sides of the Tasman, for discussions and workshops. Lynn Freeman talks with Kate Nixon, the President of Ausglass, and Heather Olesen, the past President of the NZ Society of Glass Artists.