Now, there are some ways to work around this, like using Google Chrome's full screen mode, but I wanted a way to do more. So I created a new Gmail Labs feature called "Remove Labels from Subjects" that automatically hides the labels from messages in your inbox, leaving plenty of space for the messages' subjects.
To turn it on, just go to the Labs tab under Settings and look for the following icon:
Enjoy the new screen real estate and tell us what you think!
Gmail Helps to Notebook and Netbook Users
On smaller screen resolutions - or whenever your browser screen isn't adjusted wide enough - you may only see the from email address, some labels and… well that's it (see the link above for a screenshot).