I would find it much easier if the tabs show which files are in the Editor were stacked vertically rather than horizontally. Stacked horizontally means that you run out of room
None that I know of, but there are some other tipps to make life a little easier:
1) Use Mylyn, which filters the Explorer-Views so only relevant files are shown there.
2) Have a look at "Extended VS Presentation" http://andrei.gmxhome.de/skins/index.html . This little plugin adds some useful features to reduce waste of screenspace. With it you can hide the file extension in editor tabs or limit the size of each tab and reduce the padding. Then you can remove the X and close tabs with a middle click. Each just a small saving, but they add up.