I was running a pair of flat bars cut down to 10" recently for a few weeks. Just wide enough to get an Oury grip on either end.

They definitely look cool, and are surprisingly easy to get around with. I never felt that I would lose control of the bars, and made plenty of 'emergency turns' weaving in and out of Chicago traffic. If anything, the steering feels a litte more 'quick'.

They're nice n' narrow, so I had far more confidence going into tight squeezes than with track drops. Trackstands were almost as easy as with the drops, and I was able to skip and skid with them as well (I ran a front brake with 'em, though).

But... I took them off. During longer rides my wrists would start to hurt, and I figured it would be pretty stupid to get Carpal Tunnel from a pair of novelty bars. I'll keep 'em around for a bit of fun now and then, but I can't see them being a long-term solution.