The Social Comments Plugin allows you to notify users by posting @username: somewhere in a comment in your Confluence wiki.
In the administration area you're able to configure the e-mail notification settings and the template for the notifications sent using placeholders (you need to be super admin).
Currently there are two placeholders you may use in the template:
#name# This placeholder displays the Confluence user's full name
#url# This placeholder displays the absolute url to the specific Confluence comment
#content# This placeholder displays the comment's content
#creator# This placeholder displays the comment creator's name
Take a look at the current issues at Bitbucket.org. Past releases are listed here.
