For salary and employment, consult the Bureau of Labor Statistics, Occupational Employment and Wages, May 2008 for 19-4092 Forensic Science Technicians: http://www.bls.gov/oes/current/oes194092.htm
For professional information about the field, you can consult International Association of Forensic Nursing: http://www.iafn.org/
There is also a Journal of Forensic Nursing and a newsletter with information about the field called On the Edge.