From Vince Ellis in the Free Press:
"A short note in Sunday's Boston Globe said the New York Knicks are 'trying to work out a sign-and-trade for power forward David Lee in a cost-cutting move.' And since Lee, picked 30th by the Knicks in the 2005 draft, is an athletic frontcourt player coming off a career-best season, it figures the Pistons would be interested."
Lee is a restricted free agent, and the Pistons have enough cap space to bid for his services beyond what the Knicks are willing to match. As I see it, the fact that the Knicks are willing to do a sign-and-trade is bad news for the Pistons, since it allows teams without cap space to get involved.