If you are a Professional or Business tier user, you can now configure additional notifications on a per-host basis. This allows you to setup different alerting for each host. Have people in your organization that want to know when a certain site is down, but don't want to get every alert? You can now add those alerts from the notification page on the web client. Custom alerts can be configured for email, sms, Slack and HipChat notifications. You can even specify whether you want to send alerts on down or up separately.
As always, please let us know any feedback you might have!
The Vigil Team