S.W.
www.indeed.com is one of the best websites to look for job postings.
www.LinkedIn.com is the best site for networking, and it's free - set up a profile, ask any business contacts to connect with you, join groups, see job postings, find contacts at companies you are interested in - 80% of companies who are hiring search LinkedIn for candidates.
Any reputable temp/contract agencies will keep your information confidential.
Send me any questions you might have, I work as a career/job search consultant for an Outplacement company and have a private career coaching practice. I'd also be glad to give feedback on your resume (no charge for any advice, just mom-to-mom :-)