Here are my penny-thoughts, though first I'd say that maybe this is a newer area and some experimenting of your own could end up providing information for others?

It seems that companion planting may work both ways - that the vege/herb relationship (if the right one is found) may be good for both. Most companion planting charts include both herb and vege friends and foes - just look at the herbs.

My initial thought, though, is a pest-repellent approach - find out which herbs repell which pest and group a few of those together. Probably more helpful if you know what you're combating. My herb book lists the common pests for each herb, and you could plant an herb that repells that pest next to it.

Or, like when arranging flowers or cooking, go by your own nose - what smells nice together will most likely (as nature works this way) be good for each other.

In any case, nature is a wonderful guide - weeds/herbs/flowers are scattered amongst themselves in nature, so probably the more you companion the happier all will be. :) Let us know what you discover!

(The link provided, btw, was nice)

Lynn