Resources for Primer Design
Primer-Blast from NCBI (free software with helpful hints): http://www.ncbi.nlm.nih.gov/tools/primer-blast/index.cgi?LINK_LOC=BlastHome
Primer3 (free software): http://frodo.wi.mit.edu/
Tutorial on primer design by the Board of Regents of the University of Wisconsin system: http://bioweb.uwlax.edu/GenWeb/Molecular/Seq_Anal/Primer_Design/primer_design.htm