The invention is directed to a direct methanol fuel cell and a portable computer having the same. A signal may be sent into a structure at an incidence angle from a transducer array. The reel wrap additionally includes first and second side portions that are coupled to the central portion. A second sensor senses rotary motion of the roller and outputs a second control signal. In one embodiment, the aggregating service creates a landing web page specific to the message transmitted by the user.