I downloaded the trial for Mindjet MindManager last month and was impressed with their level of Office integration. Over the weekend I received mail about a project (Mindjet Requirements Manager) that integrates MindManager with Team System, specifically, Team Foundation Server. Be sure to read the “How This Was Built” section. Very cool.
Use MindManager to create software requirements documents and turn those requirements into work items on Microsoft Visual Studio Team System. The requirements map then becomes a bi-directional link to the work items.
In addition, see this blog post (How to Build an Enterprise Integration in 4 Days) by Michael Scherotter for more of the background on this project.