Anyone that's used Eclipse before will no doubt miss this super productivity feature: annotable tags or placemarks, situated in proportion to their location in a file, that do not scroll out of view i.e. the green thingies in the following image.
Immensely useful for jumping back and forth between sections of code. I've been waiting, to no avail, for 10 years for MS to bring this feature to visual studio.
Please consider bringing this feature to Visual Assist.
If you're using VS2010 or later, the Enhanced Scroll Bar feature in Microsoft's Productivity Power Tools may come close to what you want. The scroll bar shows the whole file and has markers for the bookmarks.