Hello, it is really strange to find this with my site at Google: during the last four days, when I searched my keyword in Google.com, sometimes I found my site was completely out of Google, when I became worried about it and tried to search again, my site comes back again. A couple of hours later, my site disappeared again.
Yah, I saw the same thing happend to a couple other sites. Its really wierd, try searching your known keyword and keep on clicking on the search button, you will see the two different servers google is using at this time. I hope the new/better one stays.