In web.config, EPiServer reads several settings from the <episerver> section. Due to different OS setups, some developers may need another setup than others and a configSource attribute on this section (or subsections) may help a lot to distribute settings to local settings files not checked into the same project.
Also, the same problem comes into account when deploying to test, staging, production environments.
I hope you can take this one into consideration.
As for all sections, this is also possible for the episerver section. To move the section, create a new configuration file and copy the whole episerver section to that file. Then remove the section in this file and add this line insted:
<episerver configSource="episerver.config" />
Works perfectly, but beware about upgrades, as the installer does not understand this (yet).