Serious Eats - seriouseats.com

Had to add a couple more places in Brussels:
Pierre Marcolini
Au Bouquet Romain (this was by far my favorite of the two)

I wrote blogposts on the Au Bouquet Romain ones here and the Pierre Marcolini ones here.

Robyn,

You are a god-send!!!! I just came back from Paris last month and ate my last Macaron I bought at Laduree (by suggestion of Jacques Torres at the November chocolate show) and went online to see if Laduree has mail order to the US, which they do not! I panicked, but then thought, I live in NY, I can get anything here, so, I searched and searched and came across this article. Thank you! Thank you! Thank you! French Macarons are the most sublime and addicting things I have ever had!!!!!