Shops are businesses that supply people to companies when thy need them for special projects or temporary situations. Try the phone book under "engineering job shops", They use to be big in the aerospace industry. I've met people who worked 25 oor 30 years and never had a "real" job. .
Job shops use to be smaller businesses but now many large companies ( likke Bechtel and the Washington group) run their own. They can hire people for more money and shorter durations that way. There are a bunch of them listed on the Roadtechs website. Heres a typical companies website
Shops use to deal almost exclustivly in engineers and designers. In the last 6 or 8 years I've seen shops that supply butchers, bakers and candlestick makers.
The pay for jobs is probably down at the moment because of the way the economy is. When times are good and companies need you they pay overtime, per diem etc. Contract employee expenses can be charged directly to a job, just like nuts and bolts. Your wages as a contractor are treated differently by accountants that employee wages. Companies usually set a limit of what they will pay and then ask "Shops" to find someone who fits their needs. Your rate will be set based on a lot of things including: your expertise in what they are looking for, competition( how many people are willling to work cheaper than you), and how bad they want you. Your "pimp" works with the company and you to get you in and get you all the money he can get for you ( he/she makes more that way).
I am not recomending that people do this just pointing out that it may be better than doing nothing. I know people that do it and love it.
Most shops pay by the week.
Your recuiter sounds like a shop. Will you be working independantly? or will you be taking direction from someone in the company. One way your just an employee getting your pay check through another company, the other way your a consultant. Your best stratigy is to become very good in some areas. Once your reputation is know the'll call you when they need you. You'll be like the high priced gun fighter in the old westerns, sometimes second best just aint good enough.
I used the term "pimp" above because thats what shops and the people who ran them were refered to. The analogy was that when a company needed help they wanted it so bad they'd pay anything for it and when they were through with you they didn't want to see you again. The Roattechs site used to be called Roadwhore.
Sorry about all the rambline, hope ti helps a little -it's chow time.