Realrose,
Yes the seaweed is a good source of maintenance iodine and may be the perfect amount for many people. The reason to keep the high dose iodine around is for emergencies and to act as an anti-biotic if there is ever a need. If you have not had a chance to read any of the links in the article, I highly recommend some research time. There is some really good information abounding.
Cheers,
Evan