Exactly the kind of info I was looking for and why I like DR1 so much. We're debating between P.R. and Florida. Latin culture for the wife or Disney for the three year old. Right now Fla. is in the lead. Can't wait 'till we can all get back to Santo Domingo.
Florida has lots of Latin culture, especially in south Florida.
Would a three year old really appreciate Disney? (I don't know, but parents on here might have an idea.)
In the matter of the visa and passport and entry:
You are going to be dealing with two agencies, both under the auspices of Homeland Security.
Border & Customs will probably let your wife back into the mainland US, as Puerto Rico is a US territory and you will be carrying proof that she is legally present in the US after entering legally. (Legal presence and legal entry are two separate legal issues.)
Afterwards, you are going to be dealing with Citizenship & Immigration Services to adjust your wife's status. Theoretically, you should not have a problem. HOWEVER, there are many, many, many documented cases where CIS agents have an interpretation of law and policy that is not consistent with sanity. Agents are trained to look for reasons NOT to adjust status.
If an immigration attorney is assisting you with your case, then follow the attorney's advice.
If you do not have an attorney, there are a number of non-profits who assist with immigration matters on a sliding scale basis. (I used to work for one of those, but it has been years, and people still working in the field say it is a nightmare today.)