Until September 22, 2009, you’ll receive 50% more Starpoints when you transfer your Membership Rewards points to Starwood Preferred Guest. While the normal transfer rate is 3 MR points for 1 Starpoint, under the current promo, the rate is 2 MR points per Starpoint. Points must be transferred in increments of 1,000.

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In other Membership Rewards-related news, Amex announced a new “Everyday Charges” feature. Cardmembers can now use their pionts towards “everyday” expenses that they charge to their card, including groceries, gas, phone, wireless and cable bills. Redemption can be performed through the online statement by clicking the “Use Points for Everyday Charges” link. To learn more, see membershiprewards.com/everydaycharges.