I know it is starcraft, but reguardless... there is no way they start a game from scratch and complete it within two years.
Not looking good for the '07 projection of D3 thou.
Update! Here's a link to the original source article which DOES mention another Diablo 3 sequel as well. While it's still looking like D3 won't come out this year, this is a nice sign that they're not done with the series by any means.