So far as I'm aware, it's still running, @jmac - you may have ended up in a different group though. Remember, this is still a test, so it's important that some folks
don't see it active some of the time. FWIW, the results have been... Not great so far: a significantly smaller number of people are clicking through to randomly-selected questions than to the top questions, which hints that the algorithm may've been doing a better job of identifying general-interest questions across topics than some expected. —
Shog9 6 mins ago