Because of a data centre test you will be able to read but not edit the wikis for 20 to 30 minutes on 3 May. This will start at 14:00 (UTC). You might lose edits if you try to save during this time. You can read more about this.
Changes this week
There is no new MediaWiki version this week. This is because of the data centre test.
You can join the next meeting with the VisualEditor team. During the meeting, you can tell developers which bugs you think are the most important. The meeting will be on 2 May at 19:00 (UTC). See how to join.
All Wikimedia wikis will have cookie blocks from May 8. This is an extension to the autoblock system so when a user is blocked, the next time they visit the wiki a cookie will be set. This means that even if the user switches accounts and to a new IP address the cookie will block them again. 
The Publish changes, Show preview and Show changes buttons will look slightly different. This is to fit with the OOUI look. Users can test scripts, gadgets and so on to see if they work with the new interface by adding &ooui=1 to the URL.