Amtrak Guest RewardsŪ Rewards Participants

As a member of Amtrak Guest RewardsŪ, you can earn points that turn into valuable rewards.
http://www.amtrakguestrewards.com/do...g_partners.cfm

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Seems they aren't yet providing much info!

BTW, This was also posted earlier at:
http://www.flyertalk.com/forum/Forum1/HTML/003770.html