Yes, EUA has been working. I actually got all three of my wed flights upgraded before hand including an MSP-DTW connection. (Normally the other two flights are the only ones that auto-upgrade) They seem for the most part to have it working.

I hate that I have to call to get a seat assignment though since online won't give you the FC map for seats unless you're checking in, but am happy to know I'm at least up front.

flyerCO(NW)