It's not often that we come across a gadget for which we can't possibly divine a use. At first ponder, you'd think the WheelNavi might have some purpose as an aid to impossibly technical driving — like the kind found on an Autocross course or through a field of boulders — but then you realize that its data — the degree of turn — is displayed so far out of the driver's line of site as to be totally useless. Could it be a learning aid for really dim driving students maybe? We just don't' get it. [Product Page via TFTS]