Times have certainly changed. When we were in Belgium in 2006 you could not find Westvleteren anywhere but at the cafe. It was a dry spell.
That Iten is pretty neat for the tour. We did Belgium without a tour and our rule was everything had to be in close proximity to a train station. We also timed it to hit a now defunct beer festival, open house at Rodenbach, open house at Palm, and open house at the Royal Palace. We did Brussels, Antwerp, Bruges, Gent, Brussels. The other thing we skipped other than open houses was breweries. I do wish we had visited Cantillon as part of the trip.
If/When we go back I'd like to visit De Dolle, Fantome, De Proef, and Caracole.