Google Search History
I stumbled upon a cool new feature from Google today. It's called Search History. Basically, it lets you keep a list of all of your search queries.

After playing with it for a few minutes, it appears to be a Google version of del.icio.us. Instead of using tags, it uses your queries.

In addition to storing the queries by date, Search History allows you to jump to any day's queries with a little calendar widget and remove items that you'd rather forget that you searched for.

https://www.google.com/searchhistory/login