Saw an announcement on Facebook this morning for a new Marriott Rewards Premier Business Visa Signature Card. Essentially, it's the exact same card as the consumer with the exact same offer and benefits. The annual fee is slightly higher, though, at $99/annum. However, if you have the consumer card, you are ineligible for the signup bonus... 
Marriott Rewards Premier Business Visa Signature
This could be useful for those that have a use for it, and when coupled with the consumer card, could help you maintain status easier.
The other day, the travel nerds pointed out enhanced features of the Ritz-Carlton Visa Signature card as well. Now you get Gold Elite for the first year, and whenever you spend at least $10,000 on the card. Spend $75,000 or more and you receive Platinum Elite status. Oh, and the airline incidental credit has ben raised to $300/annum, making the annual fee a net $95/annum. Oh, and a number of commenters have said that the Ritz-Carlton Visa's Elite statuses did apply to their Marriott Rewards account!