Another month, another release of DotNetNuke! Check out version 5.4.0 that was just released a few hours ago.
Joe Brinkman has a full blog post about the release here
The two biggest things are some features that were added into DNN 5.3 Professional Edition have been ported to the Community Edition, that means you get them for free! These two features are the Telerik Rad Editor and the Ribbon Bar Control Panel. If you're upgrading a DNN site these won't be enabled by default, so you'll need to turn them on. I made a blog post covering how to enable them, get it here.
Now, go get upgrading! (or installing if you haven't used DNN before)