I just received the following email from SPG Amex:

How You Earn Points with Your Card
When you use your Card, you can earn

• 6X points for each dollar of eligible purchases at participating SPG and Marriott RewardsŪ hotels1,2
• 2X points on all other eligible purchases1,2
• 4X points for each dollar of eligible purchases at U.S. restaurants, at U.S. gas stations, on U.S. wireless telephone services purchased directly from U.S. service providers, and on U.S. purchases for shipping.2 Please note this update only applies to The Starwood Preferred Guest Business Credit Card from American Express.

Its hard to read the 4x blurb... are 4x points solely for the Business card or are they for restaurants, gas and wireless, but not shipping? Assuming the latter - this makes the card good at least for SPG hotels, gas, and wireless. Other cards beat them on restaurants... so that's still a no go category.