We've seen Sharp e-dictionaries aplenty here, but with the exception of a couple of models, that same ol' clamshell form factor's bound to send you to snoozefest sooner or later. To keep the Japanese bookworms interested, Sharp's latest offering -- dubbed the Brain PW-AC10 -- has packaged itself in a BlackBerry-esque candybar, which it claims makes it the industry's lightest e-dictionary while carrying two AAA batteries that keep