American Heritage Dictionary
(1)
Century Dictionary
GNU Webster's 1913
WordNet
(2)
Elsewhere on the web
So that's what we call the misguided missile.— Charles Elachi on the Mars Rovers
Nowhere did I say you personally were 'misguided' -— RealClimate
In what can only be described as a misguided and knee-jerk response to the Craigslist Killer drama, attorneys general around the country want the site to shut down its erotic services section.
Cheerfulness and frankness prevailed Never was nobler duty confided to human hands than the uplifting and upbuilding of the prostrate and bleeding South--misguided, perhaps, but beautiful in her suffering, and honest, brave and generous always.— Standard Selections A Collection and Adaptation of Superior Productions From Best Authors For Use in Class Room and on the Platform
The pretended mercy to the misguided was a mere delusion The superintendents, preachers, teachers, ministers, sermon-makers, deacons, and other officers, were to be executed with the halter, with confiscation of their whole property.— PG Edition of Netherlands series — Complete

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You can expect to see this word about twice a week.