First off, thanks for the great IDE. I've been using PhpEd for a few years thinking it was the best thing since sliced bread, but today I could hardly stand working without PhpStorm.
I work with a large inhouse developed PHP framework which runs many of our sites. We have a few hundred files called "index.php" in different directories. My problem is that when a few, about 5-10 of these, are open at the same time it gets quite confusing. I've been looking at colored scopes, but there aren't enough colors.
Thus, my two suggestions to make this great IDE even better:
1) Extend "Goto file" so that it can handle a partial path, so I can search for "editor/index.php" and get matches for "site/a/editor/index.php" and "site/b/editor/index.php".
2) Create an option so that the editor tabs display a partial path of x (preferably a setting) levels before the filename