Tomorrow (March 27), Emily of 'As The World Turns' will cross over to 'The Young & The Restless'. She'll be in Genoa City to confront Amber, herself a crossoveree from 'The Bold & The Beautiful', about Emily's sister Alison appearing in porn on the Internet.
It's still early in the year, but this may still be a candidate for a Toobit Award for Best Crossover of 2007. We'll see.
It definitely puts Amber in the running for eventual induction into the TV Crossover Hall of Fame!