We've been offering push notifications to Safari users on Mavericks for about a month and a half; however, even those who prefer to use Chrome or Firefox as their default browser can get the alerts in Notification Center. A one time visit to http://www.iclarified.com/push is required to subscribe; however, alerts will continue to appear in Notification Center even if you are not using Safari at the time.
For those who are mobile, the latest version of the iClarified app greatly improves push notifications times. You can get the app from the App Store.
Thanks for supporting us in 2013 and we can wait to bring you more great content in 2014!