Shapeways: Bring your creativity to life in 3D
http://www.shapeways.com/forum/index.php
Shapeways: Bring your creativity to life in 3DDiscovery : New revolutionary material can be worked like glass
http://www.shapeways.com/forum/index.php?t=rview&goto=38953&th=7170#msg_38953
http://www.espci.fr/en/news/2011-294/discovery-new-revolutio nary
It is an expoxy resin that behaves like glass and thus can be welded, recycled etc...
Ludwik Leibler is also the guy behind the self-healing rubber...