Jeffrey--
I have gone through three layoffs and a corporate bankruptcy since 2003, and held two long-term temp positions during that span while looking for work. This is with over twenty years now of commercial credit experience. Networking, by the way, did not help me find any of the permanent positions I held; only long hours plumbing the jobs on the internet and job boards, and interviewing like crazy, did that.
Networking, however, definitely helped me in finding both of the temp positions, and in fact referred me to both positions. I'd suggest talking first of all to your NACM or CMA rep, and also build up contacts at the local NACM/CMA office. If you are nearby to a regional or national credit conference, try to attend that, as you will be talking to many credit professionals and vendors to credit professionals, some of whom may know of firms looking for someone, or who may be in need of someone themselves.
The problem I've found with staffing firms is that they try to get the exact fit into a position. That's great if you have *exactly* what their client is looking for, but if you're only a close fit, someone else is more likely to get the interview for the job. Since the agency is the gatekeeper to even get to the interview for a temp position, it is much harder than you might think. It's a numbers game for the agency, and they want someone in that position ASAP, earning money for them. Also, most of the positions go to finance or accounting firms, as there aren't many purely credit staffing firms. My worst experiences were with RHI, which got me, over the space of nearly a year, *one* phone interview and *one* in-person interview, where the positions were not quite what I had been told to start with. Agencies have their uses, but they're not always the best way to go when looking for employment.
Believe me, I've been in your position more often than I care to think about. I wish you luck in finding something soon.