I love Last.fm's bar graph. It allows me to quickly compare how someone plays one song over another.
I'm trying to apply the same design to my app. It monitors the health of servers and needs to show a lot more stuff. For example, the last column shows the current upload / allocated upload / physical limit upload. Since I need much more text, the label doesn't fit over the bars and some parts are hard to read. Look how ugly the "50 Mb / 60 Mb / 80 Mb" looks. How would you design this better? Keep in mind that there will be hundreds of rows and dozens of columns, so space is limited on the screen.
I took most of Vitaly's suggestions. I added spaces around the "/". I tried it without spaces and it was too hard to parse. I decided not to color code the text because the lighter green was too hard to read. I labeled each row with the unit, rather than only labeling the header. I sacrifice space for quicker understanding of what the rows are.