As you can see, they're still putting the finishing touches on Madison's Monroe Commons, but the first Trader Joe's in Wisconsin will open for business there Friday morning. What will happen to the Regent Market Coop a few blocks away? What will happen to local liquor stores when consumers flock to the legendary Trader Joe's selection of inexpensive wines? Where will people park on Monroe Street? What about traffic on the already congested street? Stay tuned.