Here’s another step closer for Google to fully evolve into the personalized search service — Personal Web History. If you haven’t heard of it yet, you might have not also noticed that link on your Google search resulta page when you’re logged in to your Google Account.
See screenshot below:
With Web History, you’ll be able to:
* View and manage your web activity. You know that great web site you saw online and now can’t find? From now on, you can. With Web History, you can view and search across the full text of the pages you’ve visited, including Google searches, web pages, images, videos and news stories. You can also manage your web activity and remove items from your web history at any time.
* Get the search results most relevant to you. Web History helps deliver more personalized search results based on what you’ve searched for on Google and which sites you’ve visited. You might not notice a big impact on your search results early on, but they should steadily improve over time as you use Web History.
* Follow interesting trends in your web activity. Which sites do you visit frequently? How many searches did you do between 10 a.m. and 2 p.m.? Web History can tell you about these and other interesting trends on your web activity.
To some, that might sound cool. To others, it could be scary. 
this is scary.
Twitter: mparazgmail.com
says:
Yes, it pushes the envelope of “Do No Evil” even further…
Yes, I saw this last night and was surprised that it has been tracing my online browsing for more than a year now.
Search History has been there for over a year now. This new one was more usable and cool.
I wrote about this a few days ago. Looks Google likes to play ‘Big Brother’ now.
I do not like this.
Seriously, not cool.
I disabled (actually deleted the service) from my Google Account. I only let them store my emails and nothing else (oh wait, make it 2 since i use google reader!)
Been testing it during the closed alpha and closed beta… I actually like it ^_^