Try going to the US Embass in London site. However, I just read the page on the green card lottery, and I forgot that Northern Ireland, where we live is eligable, but mainland UK isn't. I have attached the page below. If you go to the US Embassy web site they do give you detail of all of the immigrant visas available. You could also wait and see what way the new immigration law pans out. It may allow people to live and work in the US for a few years, but it wouldn't allow for permanent residency.
Diversity Immigrant Visa Lottery
There is no initial fee to enter the DV Program. The U.S. Government employs no outside consultants or private services to operate the DV program. Any intermediaries or others who offer assistance to prepare an application do so without the authority or consent of the U.S. Government.
The Diversity Immigration Program makes available each year by random selection 50,000 permanent residence visas to persons from countries that have low rates of immigration to the United States. Visas are apportioned among six geographic regions based on immigration rates over the last five years, with a greater number of visas going to regions with lower rates of immigration.
Entries for the DV- 2007 Program must be submitted electronically between noon (EST) Wednesday, October 5, 2005 and noon (EST) Sunday, December 4. Applicants may access the electronic diversity visa entry form at
www.dvlottery.state.gov during the registration period beginning noon (EST) October 5. Paper entries will not be accepted. Applicants are strongly encouraged to not wait until the last week of the registration period to enter. Heavy demand may result in delays. No entries will be accepted after noon (EST) on December 4, 2005.
Eligibility to apply for this Program is determined by a person's place of birth not citizenship or residence. Persons born in any one of the following 17 excluded countries cannot participate in the Program for the year 2007. The excluded countries are: the United Kingdom (except Northern Ireland) and its dependent territories, Canada, China (mainland born), Colombia, Dominican Republic, El Salvador, Haiti, India, Jamaica, Mexico, Pakistan, Philippines, Poland, Russia, South Korea, and Vietnam.
Persons born in Northern Ireland, Hong Kong S.A.R., Macau S.A.R. and Taiwan are eligible to enter.
If you were born in an ineligible country, but your spouse was not, you can claim your spouse's country of birth instead of your own, provided you and your spouse will immigrate to the United States together. Both you and your spouse can submit individual entries. If you were born in a country where neither parent was born or residing at the time, you may be able to claim one of their countries of birth.