"Wicked" was extremely common in Vermont where I grew up, and I expect it still is. I sometimes find myself using it in everyday speech and it never seems to raise an eyebrow even out west here. "Friggin" is another word that I think is mostly a New England thing.
Where I am "friggin" has the context of a junior high kid who thinks it's a bad swear word, but doesn't quite have the nerve to say "fuck". So you don't generally hear it from people out of their teens.
