The biggest update to the GI bill in decades was signed by the President! It will more than double the benefit for military members who have served three years or more since 9/11/2001.
The feature that was most appealing for me was that your dependents can get access to your benefit! For my family, that will make a huge difference.
You need to get the details. Go to http://www.gibill.va.gov/ for the details.
Military.com also has a great breakdown of the benefit.