I closed my new card yesterday. I didnt even have the card for a month yet. I had to close it because i don't want another TL on my credit report since after applying for Orchard, i got approved for WaMu, Hooters, and Amex Delta.
If you try to close an account, they will work something out for you. For example, i was told yesterday that they will slash my Annual Fee in half, OR raise my CL to $500 instead of $300 if i stay with them.
Maybe when you call to close, they will throw something like that at you as well? Make sure your balance on the card is very small so that they know you are for real about closing the account.