Fortune: Draft Kings, a daily fantasy sports website through which users can legally wager real money, is in the midst of raising a new round of venture capital funding at a valuation of at least $1 billion. Among those in talks to invest is Disney, whose properties include ESPN. This would be the third round of funding within the past year for Boston-based Draft Kings, including a $41 million round last summer. Overall it has raised in excess of $80 million.