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\
I found the track option to be a little annoying.
I prefer to use DPack. It contain "Locate In Solution Explorer" operation, plus many other features (some are less powerful in VS2010, like their browsers), and it's free.
Note that ReSharper also have the locate feature that works batter than DPack's (in some cases, DPack's locate won't work if the file is collapsed behind folders), but you don't want to buy ReSharper only for this feature.