In case any of you guys run Arch Linux, I created a mobiperl package and uploaded it to the AUR. In case you're unaware, mobiperl converts between formats and allows editing off metadata (change the title and author of a book, for example).
Also, I uploaded 0.0.43 because it's the latest version I could find. If anyone has 0.0.6 (the author's last version before the site went down), please let me know and I'll update this package.
https://aur.archlinux.org/packages/mobiperl/