Picasa Web Albums is Google's Web photo-hosting service. Users get 1GB of free hosting, and images can be uploaded and manipulated using Picasa, Google's free desktop photo management application. Users who want additional storage can shell out up to $500 a year to bump up the hosted space to 400 times the size of the free hosting service.
We really like the integration between the desktop and Web application. Similar to .Mac and iPhoto, Picasa makes it really simple to take photos from your desktop and publish them online for others to see. We're also fans of the built-in geotagging that lets you set where photos were taken either by single photo, or by entire albums. It's a great way to browse photos if you feel like exploring.