Updated the app, now depends on *gasp* non-free packages since some users just don't know how to install the packages it needs.
Also updated the desktop file so that now it doesn't use the hildon theme.
Although this has the downside that you need a stylus now (slightly finger usable), the UI is much much more usable (everything was cramped with the hildon theme).
Unpacking seems to work for me, I'll wait for user feedback on what fails and what doesn't.
I haven't added the patch that allows open with to work yet.