I read about this in Bio-IT World and had to go check it out. It's called the Genome Projector and it has to be the coolest genome browser I've ever seen.
They have 320 bacterial genomes to play with. Naturally, I chose our friend E. coli. The little red pins in the picture below mark the positions of ribosomal RNA genes (It's not perfect, at least one of these genes is a ribosomal RNA methyltransferase and not a 16S ribosomal RNA.) ... Read more