I was on that website and all the links from it last night. The US embassy and gov't does not answer my questions or give tips as far as letters of invitation or recommendation. It only tells you how to apply, which I understand.
Thanks so much Katie. Snorkelgirl, good to hear your experience. I am told it is much harder for a Belizean, especially when they are not the one covering expenses for their trip and are invited by someone.