The world's leading Web search engine has helpfully gathered together a complete list of its ever-growing range of special features, tips and tricks. It also offers a wide range of useful Web tools and services, including Gmail, the free Web-based email you can now port to your cell phone port to your cell phone; Picasa, a great way to organize and edit your photos on your desktop (and share them online using the Web-album publishing tool); and the stellar Google Maps, which recently introduced Street Maps, 360-degree street-level photographic views that allow virtual movement through a location. The images were shot over several months by camera-equipped vans that simply drove up and down the streets of Denver, New York, San Francisco, Las Vegas and Miami (some of the results have raised protests from privacy advocates ). Google's maps now mark public transit stops too. (As an alternative, HopStop does an excellent job providing door-to-door directions by subway or bus from any two points in New York, Chicago, Boston, Washington and San Francisco.)