I think what you are looking for is here: http://www.use-it.be/
"The maps and guides are made by locals who know what's going on in the city, and who give no-nonsense inside advice".
Personally, I would spend just a day in Brussels and use the rest to visit Gent & Bruges... by train(trains work wonderful in Belgium:). Definitively, in Brussels you should visit a bar called "Delirium Tremends"(http://www.deliriumcafe.be/) with hundreds of different beer types. Even if its so turistic, I like Atomium too:-) Enjoy! almost 8 years ago