Nice piece on Language Johnson, an Economist blog dedicated to language use, on the recent influx of  'Britishisms' into American English. Apparently, 'kerfuffle', 'snog', 'nick' and 'cheers' are all happily finding their way into the American vernacular, and as the poster points out, unlike Brits who worry about Americanisms, Americans are more relaxed about these lexical imports.