There are two new offerings for Visio 2010 general usage and power user tips.
The book I've just written has gone to publication, and is available here:
Using Microsoft Visio 2010, QUE PublishingFellow MVP Scott Helmers has also produced a fine offering:
Microsoft Visio 2010 Step by StepBoth books cover the new features in Visio 2010 in detail and very well. Scott's book talks a bit more about the features you only get if you have the Pro and Premium editions, whereas Using Microsoft Visio 2010 tries to keep Standard users in mind as much as possible. Scott's book focuses heavily on network, flowchart and process diagrams, where I delve into scaled drawings and other areas a bit more.
Using Microsoft Visio 2010 also comes with online access to its contents, and is accompanied by 37 videos and 11 audio clips to make it "more than just a book". Whichever book you purchase, if you work through all the examples, you will be a
very proficient Visio 2010 user, and will learn a lot!
If you've read either one, I'd love to hear your opinions!