I thought it was nothing to move maplist.org from one host company to another. But it turns out the 2 day downtime is a disaster, especially for Google indexed pages.
It has been two months since this downtime but the indexed pages in Google are still declining, which means the number of vistors are declining quickly as well.
Google seems to destroy all of the previous indexed pages when its robots found out a long downtime, say more than one days.
So, be careful, my dear webmasters. Don’t let you sites down for more than one hour or you will certainly feel miserable like me.