There are more filaments from various materials available for 3d printing then just simple PLA and ABS. Here are some links on news related to filaments ...
http://nothinglabs.blogspot.com/2013/09/filament-roundup-3d-printing-in-all.html
Here is his detailed presentation from google docs: http://tinyurl.com/kq3sbjd
http://printm3d.com/filaments/
http://recreus.com/
http://algorithmicart.wordpress.com/2013/08/22/3d-printing-with-flexible-materials-flexpla-tests/
Excellent roundup post by NothingLabs on various filaments, how to print with them and their properties:
http://nothinglabs.blogspot.com/2013/09/filament-roundup-3d-printing-in-all.html
Here is his detailed presentation from google docs: http://tinyurl.com/kq3sbjd
Color changing and magnetic metal infused 3d printing filaments
http://printm3d.com/filaments/
New flexible material - Filaflex
http://recreus.com/
Hackaday video from Maker Faire 2013:
Extensive test of soft PLA (FlexPLA):
http://algorithmicart.wordpress.com/2013/08/22/3d-printing-with-flexible-materials-flexpla-tests/
