They are ready to start. Next week.
Keep in mind that we're migrating data centers next week and all the Wikipedias will be subject to intermittent read-only access and possibly other issues. Hopefully we'll be stable by Thursday.
VisualEditor looks like the primary goal, having Milkshake as secondary option for whoever feels more interested.
To the best of my knowledge the only publicly accessible page for VE exists at http://www.mediawiki.org/wiki/VisualEditor:Test, and I believe one might have to have special rights to edit that page.
Of course we can do further outreach, but the Wikipedias alone should already provide the critical mass of contributors, right?
By what mechanism?
Then we need to define the right environment for testing. Is it a fresh install in Labs? Something else?
I would love to see VE widely enabled in beta labs. I suspect that is a non-trivial project.
The sprint could be on Thursday, starting in Asian friendly times since this is where most of the potential testers will be based.
Seems risky to me. Others might know differently.
-Chris