What does Visio 2007 have that previous versions don't?

Answer 1

2007 has autoconnect which lets you align diagrams how you want. You can also add text boxes into diagrams for free form text.

Remove information hidden with 07 Visio files or information you don�t want others to see, such as comments, thumbnail previews, personal information in document properties, and unused data and shapes from diagrams, while also reducing the size of the drawing file.

07 diagrams allows you to choose a color or an effect for an entire page or diagram, or multiple diagrams�all with only one click. Sample diagrams with integrated data. Open sample diagrams that have data integrated with them to get ideas for creating and designing your own diagrams.