Gemnasium sends you an email whenever a new version is released for a gem that you use.
Depending on how many gem dependencies your repositories have, it could mean a lot of emails.
Gemnasium helps you filter out the noise by allowing you to easily turn off notifications for particular gems or for entire repositories… right from your email.
Your also can choose to receive them in a digest email on a daily or weekly basis, summarizing all of the day's or week’s updates to your gems.
37signals' Campfire integration is also supported!
Please check your configuration in your settings page: https://gemnasium.com/settings/notifications