I've submitted another suggestion on the VS2005 feedback site:

Improve the documentation feature of Visual Studio.

Right now in ASP.NET you can switch between 2 views: design and code.

Similarly I would like to be able, for a *.cs file to switch between code and documentation.

This would improve the usefulness of the documentation, by making the documentation more visible the quality go up, because developers will put more effort into it.

Again, feel free to vote for this feature if you think it is a good idea: https://connect.microsoft.com/VisualStudio/feedback/ViewFeedback.aspx?FeedbackID=251027