I am interested in the following features: Code highlighting, Intellisense, Refactorings, Code navigation (Go to Definition etc.).
If this functionality is missing from Visual Studio 2010 maybe Microsoft is planning to add these features in the future or there are community project to develop IronRuby tooling add-in?
Good news! IronRuby Tools for Visual Studio 2010 were released on 21 OCT 2010 and are available here: http://ironruby.codeplex.com/releases/view/49097
no native support. not by microsoft directly
Ruby in Steel
This add-on to Visual Studio by SapphireSteel makes developing Ruby applications inside Visual Studio much more natural. It adds new Ruby project types, intellisense, code snippets, and syntax highlighting. But it costs money.
To clarify, SapphireSteel Software released a free IronRuby IDE way back in February 2008 - with code coloring, project management, build and run, visual form design etc. However, the IronRuby team was not overwhelmingly supportive of this project and we have now ceased development as explained here: http://www.sapphiresteel.com/Goodbye-IronRuby-Hello-Ruby-In
best wishes
Huw Collingbourne
SapphireSteel Software
Microsoft has recently released IronPython tools for Visual Studio and they are working on the same thing for IronRuby. No planned release date yet but they are working on it.