The following links will take you to websites that provide additional information relevant to the study of microbial systems:
Annual Review of Microbiology (AR) http://www.annualreviews.org/journal/micro
Applied & Environmental Microbiology (ASM) http://aem.asm.org/
The International Society for Microbial Ecology Journal (ISME) http://www.nature.com/ismej/index.html
Nature Reviews Microbiology (NPG) http://www.nature.com/nrmicro/index.html
ASM Podcasts, including TWIM, TWIV, TWIP, etc.
Small Things Considered (by Elio Schaechter in ASM's Microbe)