I wrote a script that dumps a report of ebook formats. It's very similar to what can be done within calibre, but a little more convenient (if you already have perl installed...).
So if you install Perl (
http://strawberryperl.com/), the attached script will dump all your ebooks and columns for each ebook format. The value will be 0 (the format isn't available for that ebook) or 1 (the format does exist for that ebook).
It assumes your library is in your home directory => Dropbox => Calibre Library. You can change that by running the script with the --library parameter.
The report is dumped to the screen, so you'll need to redirect to a file.
ebook_versions.pl > report.csv
or
ebook_versions.pl --library "path/to/Calibre Library" > report.csv