Both of these were found at Mohan's Hindu Image Gallery (http://www.geocities.com/SoHo/lofts/6834).

These two pictures are paintings that can be purchased at http://www.lakshmi.com. The next two pictures can also be found there, however, the last one is not for sale. The first one is of Siva as Nataraja, and the last one is from a private collection. web.

This little picture I just found randomly on the web, and the last three of pictures/illustrations of statues of Siva as Nataraja, dancing the Cosmic Dance of creation.