Found this discount at http://www.trainweb.org/espa/espa805.htm

'New York By Rail' Travel Discount

The 2005 'New York By Rail' Travel Guide is now available! Featuring destinations across the state, this 50 page, full color, guide can be obtained at rail stations, on board Empire Corridor trains or by contacting Amtrak at 1-800-872-7245 or on line at www.amtrak.com.

This year's Travel Guide is offering a 'New York By Rail 50% Off Companion Fare' discount, valid through March 2006. Using discount code V707, New York State travelers can save 50% off a second adult fare when traveling in pairs. Specific advance purchase requirements, blackout dates and other restrictions apply. Contact Amtrak for full details.

Worth trying if you are traveling within NYS.