T8X Spider Bot: one of the cutest spider bots on the market. It has 26 servo motors, WiFi, and a plastic shell.
Vorpal Combat Hexapod: an open source 3D printed robot that you can program using Scratch. You can control it via Bluetooth. A gamepad is available to let you trigger 60 different motions.
OVPiPod: the PhantomX AX Hexapod is a wonderful robot for researchers with 3 DOF legs. It has an Arduino compatible robo-controller. You can hack and control it from your smartphone.
Xpider: a compact robot with a visual interface for programming. Xpider fits in the palm of your hand and has 3D printable components.
Erle-Spider: a Ubuntu robot powered by ROS. It has 18 degrees of freedom and up to 45 minutes of battery life.
Have you found better looking spider bots? Please share them here.