Credit Score Experts - Closed Account

Last year wife decided she wanted a new entertainment center. We went to several furniture stores and the one she liked best came from Rooms To Go. It was roughly $1,500 - it was a closeout model. So we got a great deal. As the salesman is ringing up the purchase, he mentions that they had a 36 month no interest payment promotion on their RTG credit card. We said what the heck, no interest is always a good deal, and they ran credit and approved my wife for something like $12,000 credit line. We completed the deal. We have not used the account since. Every month, I pay 1/35th of the original balance due. This is paid via automatic payment.

Yesterday she gets a letter in the mail from TD Retail Services, the credit card company behind the account. Apparently, TD and RTG are "ending their relationship" and the upshot is that on February 28th (I think that is the date, letter is not in front of me) all RTG accounts serviced by TD Retail, including ours, will be closed. We are free to use the card to charge purchases until that date, and the letter specifically says there will be no change in servicing on our account. We will continue to pay TD Retail every month, and they will continue to honor all promotions such as our interest-free one.

Here's my question: What effect will them closing the account have on my wife's credit score? Her credit score is in the 730s. The current utilization on this account looks very good. I am concerned that a "closed by credit grantor" note on her trade line, along with the card limit I'm guessing going to zero, might impact her credit score.

The only reason this is really an issue for me, is that she is looking to replace her car sometime before the end of the year. We are probably going to start looking late summer.

Thanks for advice!