Where do you go to hire the guns? The places to get your article writers, ghostwriters, copywriters, designers, developers, Virtual Assistants. On most of these sites you can find people who will bid on your specific project/task. They can be from all over the world.
Below is a list of the sites we can recommend:

elance.com - quite good, I used them myself to find some designers and article writers.
guru.com - have not personally used them, but know many who has with good results.
scriptlance.com - place to find programmers and get your site built quickly.

We will be updating this with more sites as we go forward.