In case you haven’t heard, today is Cyber Monday, which American Express is marking with surprise gifts to online shoppers who spend $25 or more at participating retailers, including some that can be shared with up to three Facebook friends.

Goodies that are part of The Gift Chain include:

  • $500 American Express gift card
  • $500 Hilton Honors card
  • One-year Shoprunner membership
  • $30 Dell gift card
  • $25 Toys “R” Us gift card
  • $25 Zappos gift card
  • $20 Nike gift card

To participate, American Express card holders must register an eligible card, and then spend at least $25 at a participating online store from November 28 through December 21. AmEx will instantly send them emails detailing which gift they have won and whether it is sharable via Facebook.

Participating retailers include:

  • American Eagle Outfitters,
  • Bed Bath & Beyond,
  • Blue Nile,
  • Dell,
  • GameStop,
  • J.Crew,
  • Lenovo,
  • Neiman Marcus,
  • Nike,
  • REI,
  • Rue La La,
  • Toys “R” Us,
  • Vente-Privee USA,
  • Walmart.com,
  • YoYo.com, and
  • Zappos.

Readers: Would the promise of surprise gifts entice you to do more online shopping?