Got back a couple weeks ago. We went to Amsterdam, Leuven, Cologne, Mechelen, Dusseldorf, Brussels, Bruges, Lille, and Antwerp (Dusseldorf, Mechelen, Lille, and Antwerp only very briefly). It was a great trip. I think I could live in very happily live in Lille, Antwerp, or Mechelen. We hung out a bit with my Belgian friend in Leuven (she is studying law there), which was fun. She and her boyfriend (and most Belgian people, I suspect) are fun and hilarious.
The beer highlights: Scoring some Westvleteren (did not succeed in making it to the abbey, though), discovering the deliciousness (and variety) of Geuze, having a dozen or so glasses at Zum Uerige, the new trend (in Belgium) of "hoppy" beers, the variety of great Dutch and Belgian "brown cafes," my girlfriend finally learning to love with Belgian beer (she prefers Lambic beers, Dubbels, "hoppy" blonds, and Rochefort
I would post pics, but I didn't put them on photobucket (only facebook), and I'm too lazy to do that now.