Lists are exported as CSV, a format readable by any spreadsheet (not just MS-Excel), all data loaders such as Oracle and SFDC.
CSV can be easily read and updated through plain text editors such as MS-Windows Notepad, Mac TextEdit and Unix-like vi /emacs.
I would suggest to post as a new "Idea".
It can even make the way for two formats: XLS and XML.
Side note: Talend Open Studio for Data Integration would exceed your ETL requirements while the feature is not implemented.
(not intended to be a commercial ad!vert... it may be available few desks away)