The three robots I am currently working on: Pi Robot (the tall one); Peppy (the middle one with the shiny noggen); and Rovio, a commercial surveillance robot made by WowWee.

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This pictures gives a better look at Peppy in the middle. The black object pointing up at the spherical mirror is a wireless webcam which beams back an omnidirectional image to my desktop for processing. Toward the front and below the blue platform is a second camera for looking forward, as well as a sonar module for measuring the distance to objects.

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Pi seems surprised to see Peppy...You can also see the omnidirectional wheels on Rovio. These wheels enable Rovio to move directly sideways and diagonally while keeping its camera pointing in the same direction.

Here you can see Pi's omnidirectional mirror as well as Peppy's.