Hi Kovid,
I just tried the new version of calibredb and see the new field for the books file path (

) but not the one for the associated cover image file. I've updated the ticket with a comment to reflect this.
I've also
added another ticket,

, to request a CSV option for calibredb's list output. Currently it uses spaces to separate the fields, which can also appear in the field data making it hard to parse out. Adding a --csv option to use commas to separate the fields, including the headings, rather than spaces would greatly simplify parsing. I also threw in a request for an "all" field that would list them all.
Cheers,
Crazy