Today
Nature publishes
two papers on the Human Microbiome (credited to the Human Microbiome Consortium made up of nearly 200 researchers including myself), and in a laudable gesture the papers are free to the public (I hope they will continue to be; Jonathan Eisen has pointed out
several times that papers labeled free tend to disappear into the
Nature paywall after a while, supposedly "in error").
At any rate, they are free now and are worth a look, although being "glamour mag" papers (to use Michael Eisen's phrase), most of the meat is in the supplemental information.
A framework for human microbiome research
Structure, function and diversity of the healthy human microbiome
