My wife and I are Indonesian nationals. I have a greencard. My wife is on H1-B visa since Oct 1, 2006. Her employer is sponsoring greencard for her (EB-3). The I-140 petition has been approved, with priority date of May 2008.

It seems that she can apply for I-485 sooner if we go through the family-based route. (FB-2A)

My questions are:
1) Can I file I-130 for my wife since she already has I-140 petition approved?
2) If so, do both petitions remain valid? Can she use whichever one becomes current first?
3) If neither of the EB3/FB2A priority date becomes current when she has used up her 6 year H1-B, will she be able to get H1B year-to-year extension?
4) Does I-485 processing take similar time for EB and FB application?
5) Is there any drawback for doing this?