Most of these are created with 6 states, 4 symbols:
Bobbing waves: http://maximecb.github.com/Turing-Drawings/#3,4,0,1,1,2,3,1,...
Grey goo: http://maximecb.github.com/Turing-Drawings/#6,4,0,3,3,4,1,2,...
Rain on the window: http://maximecb.github.com/Turing-Drawings/#6,4,2,2,1,0,3,0,...
Slow spike growth: http://maximecb.github.com/Turing-Drawings/#6,4,1,2,2,5,1,0,...
Two green triangles on a vector display: http://maximecb.github.com/Turing-Drawings/#6,4,1,1,1,1,1,2,...
Throbbing triangle: http://maximecb.github.com/Turing-Drawings/#6,4,4,3,0,5,1,2,...
6 state, 3 symbols: Tearing in the world: http://maximecb.github.com/Turing-Drawings/#6,3,3,2,2,0,2,2,...
Flood-fill between black and white: http://maximecb.github.com/Turing-Drawings/#6,3,4,1,2,1,2,1,...
Snowdrifts: http://maximecb.github.com/Turing-Drawings/#6,3,2,1,2,2,2,3,...
And my favorite: Pangaea: http://maximecb.github.com/Turing-Drawings/#6,3,0,1,3,1,1,2,...