My Search History shows you all the searches you’ve done on Google and the search results you’ve clicked on” and further “you can use My Search History’s calendar feature to check the searches you did on a given day and navigate to any of them with a single click
Google goes on to say
Full-text search over your history means you can easily find any search query or results page. We also show you related history over time; you can review everything Google has ever shown you about “apples”, “bass fishing” or “the wizard of oz,” for instance, by clicking the “Related history” link next to any search term when it appears. My Search History also gives you useful info while you’re searching on Google. Next to your search results, you’ll see how many times you’ve visited a certain search result and the last time you viewed it. And if we think it will help you find what you’re looking for, we’ll grab pages you’ve already clicked on and put them above your regular web results
This all sounds very useful.
Gmail is also apparently building an RSS reader into its web interface. So now, they will have access to your email and your RSS subscription info and what articles you are interested enough to click through.
Couple that with the news that Microsoft is afraid of Google because Google is actively hiring people with skills not for search, but for products similar to what Microsoft makes and you now start to get the idea that 1) Google is tracking everything and 2) soon they will be looking to launch a Google Operating System and you start to get the idea that Bill Gates plans for world domination pale in comparison to what Google has yet up its sleeve.