Everybody's favorite dancing robot of questionable utility from Sony is finally making its way across that big wet thing that divides the fair lands of Japan and USA. The Rolly, in case you missed it, is tiny little wheeled bot that can blast some tunes out of its built-in speakers, move its cute little appendages to the music and spin around for that full-on dancing robot experience. The bot comes with pre-choreographed songs ("Also Sprach Zarathustra," Avril Lavigne's "Girlfriend" and Earth Wind and Fire's "Boogie Wonderland" -- all particular favorites of the Engadget staff), or you can use the choreography software to generate a dance for own tunes, or even program the dance yourself. The 2GB bot comes in black or white, and is available now online or in Sony Style stores for $400.

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