The New York Post has a report that the Yankees are interested in Berkman:
As for adding a bat, the Yankees have scouts following the Astros in the event that club holds a fire sale and wants to move first baseman Lance Berkman, who would be a DH for the Yankees.
There are obstacles to adding Berkman or any other high-priced bat such as the White Sox's Paul Konerko, because of the money owed. Berkman is making $14.5 million this year and Konerko $12 million. Berkman has a complete no-trade clause; Konerko a limited no-trade.