I-130 Petition For Mother

[Cuban09]

I Filed the I-130 Petition for my mother who lives in Jamaica now, but for myself I live in the United States for about 10 years now and is a U S Citizen. I mail in the I-130 form in September on the 13, 2008 and they recieved it on September 15,2008 at the Chicago IL, a week later on ( September 22, 2008) I recieved a letter stating it's at the USCIS Caifornia Service Center, it's a receipt notice with my Receipt # on it to check the status of my case online.

My Question is What is the next step in helping my mother to come to the U S and how long now will I have to wait to received another letter from them, to know if it's approved or not?

Do anyone think that before the end of this year December 2008 they will send a letter to me asking for the I-864, Affidavit of Support for me to send it in to them, Plus how many payment/bills will I also received from them to pay? I already payed the I-130 Form fee, so what's next?