Just got back from the London Embassay... A few changes that you may be aware of, but I wasn't so reporting back:
1- You can bring a cell phone & key fob. You can also take an ipad/ipod. You CANNOT take anything with a keyboard, so no laptop and no keyboard that attaches to ipad.
2- There is now a vending machine which has tea/coffee, soda/water, snacks (including hershey chocloate & butterfingers...)
The current wait is 2 - 3 weeks for passport. 8 weeks for social security card.
Also, because this was the 2nd birth we registered at the embassay, they didn't need to see any supporting docs (ie transcripts, etc...)
Cheers