The new version of MediaWiki has been on test wikis and MediaWiki.org since February 18. It will be on non-Wikipedia wikis from February 25. It will be on all Wikipedias from February 26 (calendar).
It is now easier to see template fields in VisualEditor. The fields are bigger. 
It is now easier to see when a button is disabled in VisualEditor. 
Sometimes when you copy-pasted a template in VisualEditor, it was replaced by HTML. This problem is now fixed. 
Tools in Labs will stop working for a few hours on February 24. 
You can read the notes from the last meeting with the VisualEditor team.
You can join the next weekly meeting with the VisualEditor team. During the meetings you can tell developers which bugs are the most important. The meeting will be on February 26 at 00:00 (UTC). See how to join.
At the moment you need to log in to edit Wikimedia wikis on mobile devices. You can say if anyone should be allowed to edit on the mobile sites. The discussion ends on March 15.
Images in the interface will soon work better in Opera 12.