Hi Kandel
As I applied in 2008 I sent them my origional Birth certificate and other documents and paystubs .In April 2010 I got back my origional documents with a letter that they have photocopied it and sending me back my origionals.
Through our other forum I came to know almost everyone got their dox back.I also came to know that files got transferred to local visa offices and people hear this message when they access through phone.
For more info you can check our other forum for march.April,May2010.
I hope this helps.