Beginning to show up in more areas of the US, taking on the original UK meaning as "cool" veruses the Massachusetts meaning of "very," perhaps influenced by the popularity of British imports such as Ali G and Harry Potter in addition to the internet.
"That was totally wicked!" (from the movie The Incredibles)
"Dude that's wicked!"
"Yes ma'am, we got the style that's wicked" (Rich Girl - Gwen Stefani)