It might just be the best deal ever offered by the city to the uninsured: a completely free prescription-drug discount card with savings averaging 47% off retail prices that's available to everyone. "Today, we are pleased to bring all uninsured and underinsured New Yorkers a dose of very good news," Mayor Bloomberg declared at a press conference with City Council Speaker Christine Quinn at the Target outlet in Downtown Brooklyn. He explained that the card, which took the city six years to produce, is valid at 85% of the city's pharmacies and comes with no catches for the 1.2 million people here without medical insurance. There's no charge to apply for or use the card and it can be used by an entire family. The savings can be phenomenal -- 53% on average for generic drugs and 15% for name brands.