RubyMine 4.0.3 is available (released Feb 15, 2012, updated Apr 18, 2012). Read what's new in RubyMine 4.0, download and try it. RubyMine Nire Early Access Program is now open. Visit the following pages to try early builds of next RubyMine release:
RubyMine 4.5 EAP Download and try (updated June 20July 02, 2012)