Tried to install via Git, since Rubygems hasn't been updated yet past 0.7.4.1. But I get a 404:
$ gem install betabuilder --source https://github.com/lukeredpath/betabuilder.git
ERROR: Could not find a valid gem 'betabuilder' (>= 0) in any repository
ERROR: While executing gem ... (Gem::RemoteFetcher::FetchError)
bad response Not Found 404 (https://github.com/lukeredpath/betabuilder.git/latest_specs.4.8.gz)
Tried to install via Git, since Rubygems hasn't been updated yet past 0.7.4.1. But I get a 404: