I'm pleased to read on One Mile at a Time today that Amex and Tripadvisor are partnering up for some promotions. The initial deal is a $5 statement credit for linking your Amex to Tripadvisor and writing your first review. Since I use Tripadvisor anyway, this was a no-brainer for me. Sign-up is here, but is "limited" so get it while you can.
And, looking at the Amex/TA page, it seems that they will be doing some "sync" offers here much like they've done with Twitter and Facebook. The ones currently on offer are quit appealing: $50 back on a $250 Amex travel booking, $10 back on a $50 California Pizza Kitchen purchase, and $25 back on $100 at The Palm. It looks like Amex will continue to be the most generous "free money" card for the near future.