Hopefully you saw that Alfresco 5.0.a Community Edition was released last week. Kevin Roast did a nice write-up on a few of the new features. I created a screencast based on his write-up. It is embedded below or use this link.
You might want to make the video full-screen and take the settings up to HD.
If you take a peek under the covers you’ll likely see that there are still some deprecated chunks of code hanging around, libraries that still need to be upgraded, and features you might have expected but that aren’t yet implemented. This is still an early release. You should expect several more named releases before Community Edition 5.0 stabilizes.
Use this release as a preview for what’s coming, to test your own add-ons, or to help find and report issues. If you are running Community Edition in production I’d stick with 4.2.f for now.