Yes, this is yet another IE toolbar available, however if you are doing .NET development, hopefully this tool will help you navigate through all the classes and namespaces. This toolbar is currently targeting the new MSDN site at http://msdn2.microsoft.com/. I have had several suggestions for this toolbar so it will continue to change but I wanted to get it out here for everyone to play with. Please feel free to leave comments and suggestions in the forum below.
Simply type in either the full namespace or class name and you will be directed to the MSDN documentation for your request, it's that simple.