This is cool:
Safari’s Visual Studio Help Integration (VSHI) tool lets you search across Safari’s online repository of over 2000 technical titles to find exactly the example or code fragment you need to answer the question at hand. Best of all, these results are delivered to you from within Visual Studio 2005 Beta Help. Register today to download the free Safari VSHI trial version and gain full access to Safari’s e-reference library for 30 days at no charge. Click here to download the VSHI tool now (https://secure.safaribooksonline.com/?mode=promo&promocode=vshi2005&portal=msdn).
A few weeks after you start using the tool, Visual Studio and Safari will send you a questionnaire requesting your feedback on the product.
Adding this will create a new results tab in your VS 2005 help search page that gives you access to all of the great content described above. I think this type of integration is going to be pretty popular once VS 2005 ships.