Since the last post was such a hit, I've decided to do another.
E-bot by monsterbrick. This is a very neat non-bipedal design.
Scouts by webbplats. Ignore the mini-fig. The drone/motorcycle combo is what you should be looking at.
Walker by webbplats. I know it's a chicken walker, but this one looks pretty neat.
Teeny_VT by m_o_n_k_e_y. Nice use of color for highlights.
Apoca Mech by mecharonn. Aparently this has a stand that has been photoshopped out.
Fly on the Wall by monsterbrick. This one's great. Looks like it would fit right in with my Spider mechs.