Like you, we've seen the official photographs of Bowers & Wilkins' new speaker system Zeppelin Mini ($399) but didn't know exactly what to expect from the unit in size, shape, or audio performance. Surprise: while Zeppelin Mini's interestingly mirrored top surface sort of preserves the elongated football shape of the original Zeppelin, it trades the double-conical body for a very considerably smaller curved housing that is far easier to squeeze into…