I just discovered a website called ODesk.com. It is a place for employers to post jobs that are online or remote based, and it is a place for remote workers to find online or remote jobs.
So a virtual recruiting company can post their virtual recruiting or other virtual jobs on oDesk for free. Applicants can apply for free. Of course, ODesk charges of the company hires a worker.
I have not tested it yet, but it appears to be in line with the virtual recruiting arena.