ESPN.com has an AP story with some interesting numbers.
The Yankees sold $4.6 million worth of tickets in the first four days after the A-Rod deal was announced, bringing ticket sales to $104.3 million for the season. The deal at least makes marketing sense.
On the baseball side, the Yanks are replacing Boone's $5.75m salary with a $14m obligation to Rodriguez, and capturing some of the financial difference by replacing Soriano ($5.4m) with a journeyman. Makes sense to me, as they are getting one of the best players in the game.