If you're headed to the ManageIQ Design Summit on October 7 & 8, you're in for a treat. Aaron Patterson (@tenderlove) will be leading a session in the design track on the topic of migrating ManageIQ to Ruby on Rails 4.
One of the things Aaron will valliantly tackle, in addition to Rails 4 migration and his general all-around awesomeness, is ensuring that ManageIQ stays in sync with upstream gems. At the design summit you'll have a chance to hear him talk about these and other topics - essential knowledge for developers.
This is a companion discussion topic for the original entry at http://manageiq.org/blog/2014/09/aaron-patterson-to-discuss-rails-4-migration-plans-at-design-summit/