Yesterday, I wrote a blogpost about the new Swedish service Laudio in my Swedish blog. I reached top positions for the search term "laudio" and got many visitors from the search term to my blog. But this morning those visitors had dropped dramatically and when I looked at the search, my blog post was not even in the top 100. When I did a "site:" -search for my blog and adjusted it to show posts from the last week, the post doesn't show up. So I draw the conclusion that Google has removed the post from the index? Why would they do that and is it just a temporary thing? I have not written anything strange or done anything Google doesn't like as far as I know. You can check my blog post at: http://thodah.blogspot.com/2010/09/laudio-ljudbockernas-raddning-fran.html
Well dont worry it will come back in 1-2 days or few hours . It happens normally . Happened to many times too.
It happens as Google index fresh contents, so once your content gets old, you won't be able to see that close to 100 and sometime it get vanished
maybe they have added some new upgrades and this happen.. sometimes with new upgrades you will find your first page site on 10th page. this happened with me.