We moved back in Aug 2010. I am the USC and stay at home with kids. My husband the UKC was being transferred by his company, but because it was at his request, was essentially just like being hired locally. This is important, because his US HR was unable to tell creditors that he had been with the company for 5 years. As far as they were concerned he was a new employee.
We had UK accounts with HSBC and had enough in savings from the sale of our home to qualify as a premier client. This was good because they offer a lot of perks to premiere clients, like setting up US accounts in advance of the move, taking UK credit history into account if there was a lack of US history, free international bank transfers. We ended up getting a very competitive rate from HSBC for our mortgage, which is good because we talked to two mortgage brokers and both told us we had no chance of securing one because, I had no income and my husband had no credit history. HSBC did require a 20% deposit, which I believe is the norm, but said that some parts of the country (FL, AZ) it's closer to 50% requirement.
Car loans - We were getting two cars. My dad co-signed on my lease and we paid cash from savings for my husband's used car. Once he had two months worth of paychecks under his belt, the little local bank I had kept an account with for years was willing to refinance the car for us and we got our cash back for the house...just in time! Kind of annoying, but again we found that lenders weren't willing to work with us.
It was a pretty stressful couple of months working all this out, but HSBC really was fantastic. I can't praise them enough. We are still considered a premiere client even though once we put a deposit on a house that pretty much emptied our accounts. I am sure they will review it eventually, but until then I am happy with the perks. You may find it easier if you, as the USC, will have employment.