Intended for exploration and migration, not production. And it's *READ ONLY*, so don't try to get fresh. ActiveMDB provides a wrapper of varying thickness around the utilities from Brian Bruns's MDB Tools project (http://mdbtools.sourceforge.net/). Kudos to Mr. Bruns.
Gemfile gem 'activemdb', '~> 0.2.2'
install gem install activemdb