In some other editors, when you search text, you get a small color line in the right scroll bar, so that you can instantly view the places where the text can be found, and get a feel of the density of matches.
Likewise, when viewing diffs in TortoiseGit or TortoiseSVN, small color lines in the scroll bar show places where interesting stuff happens.
Sublime Text 2 has a very cool code overview which is fairly unique on the scene. Unfortunately this code overview is mostly a zoomed-out view of the code, with no additional information.
Highlighting search matches, modified lines, pointing an arrow from some selected symbol to the place it is defined etc. could be an interesting set of new features that would uniquely leverage the code overview.
Customer support service by UserEcho