"You Are Here" on your cellphone GPS map
If you have a Cingular Blackberry 8800 (okay, I mean AT&T, the current name of the company formerly known as Cingular), when you download Google Maps for mobile and fire it up, not only do you get the map when you search for info, you get a blinking blue dot that shows you exactly where on the map you are! Why is this cool? Since Google maps knows where you are, you only have to enter "pizza" or "hospital" and they automatically show the closest ones. No more adding the zip code or city name. More more, see the GoogleBlogPost.