Mark identified a symptom of the new employment economy in this post: that companies submit requirements to him, but subsequently act slowly to hire (or don't hire at all). But he missed the trend.
Employers are risk averse. Managers with 10 years experience remember two major bust cycles (2000-2001 and 2008-2009). They need manpower to grow, but do not want to risk committing to overhead (salaries) that may hurt them in the next downturn.
Mark, if you want to succeed beyond your wildest imaginings, figure out how an employer can gain access to the skills described in their requirements, without creating the overhead that a salary implies. If you can create a win-win-win for all parties in this space (your clients, your candidates, and yourself), you will have made a major leap forward.
Of course candidates want a stable, full-time paycheck. I do too, but I've been on half-time since late 2008. I've used the opportunity to hustle up lots of consulting gigs ("Want that task done in 60 days, no long term commitment?"), and I'm working on a startup of my own. Of course, if my startup gets funded, we will hire a tiny core team and farm the rest out to contractors. There are lots of experienced, skilled folks out there to do the work...