Cybermacro is a long running forum you should check out.
I mention here with Jessica's site and my other favorite macrobiotic sites.
http://www.vivalagreens.com/theblissfulchef/?p=468Also, I suggest to get a strictly macro cookbook that explains all this in depth (which The Kind Diet only touches on it). Jessica Porter's book is the best and fun, The Hip Chick's Guide to Macrobiotics.
In my opinion (I'm not a newbie:), if you are cooking a lot it's fine to keep oils, vinegars, etc. in the cabinet. I never refridgerate mine, but I use it often.
Miso can last a long time. If you start to see dark or blackish mold that is not good. But white light greyish mold can just be scrapped off and discarded. Be sure to always use a clean utensil and smooth over the top of the miso (so no air pockets are in there).
If you like the kombu, it is best to chopped it up and eat it. If you don't like the taste you can discard it. Sea vegetables all have different textures and require different soaking and cooking techniques. But in general, dried seaweed (except for Nori) can be pre-soaked 5-10 minutes before cooking (drain off soaking liquid). If you have a specific question about a particular sea veg ask.
Pickles can last awhile, a few weeks up to months, but it depends on what type of pickle and what it is stored in.
Hope this is helpful. I will try to come on more to the forum to answer macrobiotic questions for everyone :)