Hi Angelbird,
Congrats to you and your wife!!!
I would advise you and your wife to read previous postings on this site and also Pete's site. Most of us here went through the same situation as you, burnt midnight toil religiously reading all of the facts, advice and opinion of others, and followed what we think and believe useful and relevant in our respective application.
Prepare the required documents properly, and most importantly, practice, practice and practice for the interview. Try not to assume you will get rid of an interview, but be positive.
Good luck!!!
Rands
