Not sure what you are exactly looking for? If you change the question or comment I can update my answer...
NCBI's taxonomy site has a listing of bacteria. Encyclopedia of life is also great.
Then there's UCSC's microbial genome browser.
Biocyc is great reference for bacterial genes. to get into E coli, which is the model bacterium there's Port Eco featuring 130 E coli genomes.
Am Soc Micro has an excellent E coli/ Salmonella site based on their classic reference \- you have to pay for access though.