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This product falls into the category of excellent idea, but bad execution. It uses a retractable USB mouse that has a miniature USB hub at the connection point. It is an optical two-button mouse with a scroll wheel that functions at 800dpi. The USB connector hub has two additional USB ports to use with any device. The downside; the entire package is USB 1.1. This is available for 1980 Yen or $17 if my Japanese site interpretation is correct.

Google Translated Product Page [Via Akihabara]