I have trouble convincing myself it's safe to eat any dairy that hasn't been cooked (ie cheese on pizza, milk in a cooked dish, etc), so I'm on the look out for some hot dip recipes or dips that you cook and then chill...

I'm the same with salads as others have posted above - won't eat any that I haven't prepared myself because I don't know how well they've washed the ingredients. I don't think my mum was impressed when I told her I wouldn't eat salad with Christmas dinner unless she had washed and towel-dried everything before making the salad. She particularly didn't understand washing things that get peeled... I think I may have to tell her I'll make the salad myself. (Lol, she's doubly upset that I'm not eating seafood since our normal Christmas dinner is seafood + salad!)

On the mayo thing, I thought most of the big brand mayos in the stores were pasteurised (ie safe)? I've not had any because we haven't bought any new bottles (I won't even have tomato sauce unless the bottle is in date and newly opened), but I would have thought they were safe?

Anyway, sounds like you had a lovely BBQ planned!