Rainer Schuetze has taken the D community by surprise with the announcement of Visual D, a plugin for Visual Studio that's actually coded in D. From the announcement:
* Project management
o all DMD command line options accessible
o support for resource compiler
o custom build commands
o pre/post custom build steps
o automatic dependency generation
o automatic link between dependent projects
o integrates cv2pdb for seamless debugger integration
o new project templates
* Language Service
o syntax highlighting
o simple word-completion
o import statement completion
o goto definition (using JSON file from compilation)
o smart indentation
o highlight/jump-to matching braces
o code snippets
* Supported Visual Studio versions
o VS 2005, VS 2008
o with some limitations: VS.NET 2003, VS 2010
* Easy installer for hassle-free installation
He says the project is still quite young, so it you can likely expect it to be a bit quirky yet. Now I understand the motivation behind his cv2pdb project.