Forget it!
You can't get a work visa for the USA unless:
(a) your occupation falls into particular categories (such as journalism or religious workers) ; or
(b) you're regarded as a person with 'extraordinary ability' in the sciences, arts, education, business or athletics (such as a university professor or a sportsman playing at international level) ; or
(c) you're already working for a US-based company which requires you to temporarily relocate from the UK to the USA ; or
(d) you'll be working, in pre-arranged employment, in a field where no US citizens can be recruited for the work.
(There are also a few other categories, such as military personnel and diplomats, but they're almost certainly not relevant here).
http://london.usembas...w/visa/niv/index.html
The USA currently has a high rate of unemployment. (1 in 10 nationally. Approaching 1 in 4 in some parts of the country). Unless you fall into the categories listed above you've got no more chance of getting a work visa for the USA than, say, a Cambodian or Somali citizen has of getting one to work in the UK.
Chris