I have a huge solution with multiple projects. Sometime I need to navigate to a file in Solution Explorer. Using the VS 2010 \'Navigate To\
This is actually built in to visual studio without the need for ReSharper (which I love BTW).
http://blogs.msdn.com/b/zainnab/archive/2010/03/29/track-active-item-in-solution-explorer-vstipproj0011.aspx