After what has obviously been quite the quiet spell, I've released a little more open-source to the world. This time, it's in the form of a Django application called django-rsvp. It's a simple, reusable RSVP application in the style of Evite or Meetup.com.
It requires a pretty current version of Django (1.0-beta1 or better) and is the first really reusable app I've released. Installing it is simple (grab the source from Google via the package or Subversion), put it/symlink it into your Django project/site, add "rsvp" to your INSTALLED_APPS, put a proper e-mail address into the "RSVP_FROM_EMAIL" setting, "syncdb" and add the included URLconf to your project/site's urls. Full instructions are included, though there's not much more to it than that.
Like a good application, it has decent (and 100% passing) test coverage and the included templates are easily adapted/overridden by your templates. I managed to crank it out over a pretty short amount of time so I'm pretty happy with how it turned out. Feedback is welcome, as always.