Email notifications sent by Usernoise do not arrive to me.
It is a common WordPress issue, because by default it relies on the Linux / Unix system mailer which is not set up right frequently. You can check if you have issues delivering emails by installing this plugin: http://wordpress.org/plugins/check-email/ When installed, open “Tools -> Email Check” screen and try to send a test email to the email address used for Usernoise notifications.
If you have issues delivering emails, an easiest way to fix it is to create a gmail account for outgoing emails and install my All in One Email plugin that adds missing email delivery settings to WordPress. You can also contact your web server administrator for specific instructions how to set WordPress email delivery up for your server configuration.