We've been working hard on Miro 4 for a while now. It's a very ambitious development cycle: we're implementing a lot of new features, we're fixing a lot of problems, we're improving performance, and we're fixing codebase and infrastructure issues. We've done a ton of work.
On Saturday, I put out a set of Miro 4.0 beta1 builds. We've switched into the release cycle for Miro 4.0. We're hoping to do a final release by the end of the month.
At this point, I don't think anyone's written much about Miro 4 or shown any screenshots of what it looks like right now. So here's some for your ogling:
You can also see changes in the sidebar on the left side, and filters on the top. You can also see in the sidebar the new Stores section which makes it easier to buy content from Amazon and other stores and pull it into Miro automatically.
List view has an item details pane on the bottom so you can see the details of the item. If the selected item was a music item with cover art, the cover art would show up in the item details pane.
This is where you configure DAAP-based sharing allowing you to stream media from Miro to other DAAP-supporting systems on your network. You can also sync with Android devices as well as any mass storage device (thumbdrive, external hard drive, ...).
There's a lot more, but I'm going to keep this short.
Builds are located on the nightlies page in the Sticky Files section.
Note that this is a beta release! There are still some problems and tweaks we're working on.
Also, if you help with testing and translation, please let me know so I can gleefully add you to the credits where you rightfully belong!
w00t for beta releases and w00t for almost there!