Happy news, BitHorde 0.1-beta1 is hereby released.
For Ubuntu-users, there's a short-path to installation, Ubuntu-packages are created at https://launchpad.net/~rawler/+archive/bithorde/. Just add the PPA, install the package, edit the config-file and you're good to go!
For other users, here's a tarball. You will have to fiddle yourself with creating cache-directories, constricting permissions etc, but it should generally be quite easy.
Good Luck, and don't hesitate to ask questions.