Links
Below are some interesting links related to Geomicrobiology

ISSM--International Society for Subsurface Microbiology http://www.issm.net
American Society for Microbiology http://www.asm.org/
EPA Microbiology http://www.epa.gov/nerlcwww/
Cells Alive! http://www.cellsalive.com/
Microbe World http://www.microbeworld.org/
Life in Extreme Environments http://www.astrobiology.com/extreme.html
Subsurface Microbiology http://wwwbrr.cr.usgs.gov/bacteria/
LSU Geomicrobiology Research http://www.geol.lsu.edu/Faculty/Engel/
Biogeosciences http://www.biogeosciences.org