Since quite often a good map may need some post processing trough some third party graphic software it would be nice to export layouts to some vector graphic file formats
This idea has been merged with Add .SVG and .EPS to map layouts.
By now Arcgis already allow to export to Adobe Illustrator files (.ai) but it lacks on exporting to other formats.
In my opinion the functionality of exporting to encapsulated postscript (.eps) files should be implemented because of its compatible with many graphical softwares and it is very useful for many purposes.
Thanks a lot,