The NetBeans team has, unfortunately, decided to remove Ruby and Rails support from the NetBeans IDE:
After thorough consideration, we have taken the difficult step to discontinue support for Ruby on Rails in the NetBeans IDE.
As of January 27, the Ruby on Rails module will be gone from development builds of NetBeans IDE 7.0.
NetBeans has served me well for larger projects over the years, and NetBeans 6.9.1 retains its existing support for Ruby and Rails. But perhaps it's time to start considering Ruby IDE alternatives, and I'm open to suggestions.
