notification question

I have a basic question on how to handle a simple notification system.  I have an intranet site that contains a simple blog.  When someone creates a new blog article, I would like to notify users with a badge or any notification method.  What is the best way to handle this?  Timestamp the blog post and compare it to the last time the user logged in?  I assume there is a simple lightweight way to do this.  I can write some process that compares timestamps but I can see this method getting klunky.  Should I consider using a push system once a blog post is created?  thoughts?