Quick post just to direct your attention to a new article in Nature Methods, under the "Technology Feature" section, discussing qPCR. This is a very powerful technique, but care must be taken when setting it up in order to arrive to the right conclusions.
Alejandro Montenegro-Montero is a grad student in the Molecular Genetics Program at Pontificia Universidad Católica de Chile. He is the editor of Molbio Research Highlights. You can contact him at "aemonten (at) gmail.com"