Ahmed,
You might want to begin by checking the DCF guide:
http://www.visajourney.com/forums/index.ph...om&page=dcfThat has a lot of information about DCF.
As far as evidence goes, print outs of joint bank accounts are great, along with photos, documents showing shared car insurance (if you have it), a copy of your lease or mortgage (with both people's names on it). It's hard to tell you what to show, because it totally depends on what you have available.
I'm afraid I don't understand your question about DCF and USCIS, but I think reading the DCF guide will help clarify a little bit.
I'm not sure about where you will have to interview and whether or not you can move to Saudi Arabia while waiting to hear about your I-130 petition. Others on this forum might be able to help you answer that.
Good luck to you!
Mary
QUOTE(AHMED_ABDALLAH5 @ May 10 2007, 09:01 AM)

HELLO EVERYONE
i hope to evryone to achieve what he hopes soooon
im ahmed from egypt married from an american woman here and live here from more than year i wanna ask about what should we have for evidence for the 1st meeting only pics and marriage certifacte? . and we have shared banks accounts should i take with me?
really im wondering how is it a DCF and they will give the papers back to USCIS ?
how long will it take from the 1st interview and the 2nd one?
must we stay in the same country after filing the I-130 or we can move to saudi arabia and do the interview there?
thanks
ahmed and marylou