The idea is you just want to press some keyboard shortcut, type in the filename that's in the solution, and go directly to that file.  No solution explorer.  No open file dialog. 

This blog post has moved to http://saraford.net/2008/03/04/did-you-know-how-to-open-a-file-in-the-solution-without-using-either-a-tool-window-or-a-dialog-164/