Navy, I get my almond flour from http://store.honeyvillegrain.com/blanchedalmondflour5lb.aspx when they have a good sale. I don't use a lot of almond flour (I mostly make brownies with almond butter), but it works really well for things like pizza crust. I also want to make these cinnamon rolls that everyone has been raving about: http://heal-balance-live.blogspot.com/2009/07/recipe-review-wendys-cinnamon-rolls.html
If you don't mind spending more money, the finest almond flour available is at http://www.scdkitchen.com/flour.html. It's supposed to be the best for making cakes.
Sometimes I use pecan flour as well, which I buy at http://www.sunnylandfarms.com/store/subcategories/Fancy-Pecan-Meal.
Oh, and coconut flour! I haven't used it a lot, but it works really well in the right recipe. I've just been using Bob's Red Mill Coconut Flour, which you can buy at grocery stores that cater to the health food crowd (Whole Foods, Sprouts, etc.). I know a lot of SCDers don't like it though, and get there's at http://www.tropicaltraditions.com/organic_coconut_flour.htm.
I've never purchased from http://www.digestivewellness.com/subcategoryitems-digestive_wellness_scd_legal_food-nut_flours-24-11.html, but they have almond flour, pecan flour, hazelnut flour, cashew flour, brazil nut flour, walnut flour, and coconut flour. It's an SCD specialty store, but shipping can be steep.
35 years old, Crohn's disease for 15 of them
Resection of ileocecal valve on 09/22/09
Current Meds: LDN, Pentasa, Effexor XR
Supplements: 3 kinds of Fish Oil, Multi-Vitamin, Vitamin D, Calcium, CoQ10, Enzymes
SCD since 12/01/08 - eating Stage 3 foods