Amtrak Informative - Amtrak Fall Savings Program
Amtrak is offering some very low fares for travel this Fall. Go to AMTRAK.COM then click on HOT DEALS, Scroll down to Act Fast — Travel Leisurely and click. Many of the fares are cheaper than driving. These are for coach only. Upgrades will not be available on this special. But you have to book by Aug 8. As far as I know Amtrak is not openly advertising this sale.
Update: The fares are nonrefundable. The web site doesn't mention that.