The new job has taken up a lot more of my free time than I'd like, but development continues, very slowly. Version 0.4.6 should be showing up on CPAN and Debian Unstable shortly, and improves the dependencies list in the README, as well as flagging EReader HTML output as XHTML. EReader HTML output should also be slightly improved now as well.
Time permitting, my next plans are to try to build a better plugin infrastructure so someone can just drop an extra DRM-handling module into the system and have it work, and double-check on that potential problem with Unicode and boundaries in Mobipocket files that I still haven't had time to create a unit test for.
Also, ebook-tools is now a project on GitHub:
http://github.com/AZed/ebook-tools
Feel free to use that to submit patches/branches to me.