First Looks: Visual Studio 2010 tooling for SharePoint

Via Soma: Sharepoint tools support in Visual Studio
http://blogs.msdn.com/somasegar/archive/2009/02/19/sharepoint-tools-support-in-visual-studio.aspx

In the screenshots, note the .package and .feature files, as well as the Packaging Explorer tab on the right. In the example a feature is displayed where there are several elements available in the solution (left), with just the workflow features being selected into “Workflows.feature” (right).