A free place for your photos
Photo labs and online photo services let you store digital pictures online, but often they cost money or impose limits on how many you can put there, or on the photos' maximum resolution.
On the other hand, photo.net (set up by MIT professor Phil Greenspun) provides better picture-archiving services, as well as a huge photographic community, for free. (You can pay for extended services too, and the subscription is cheap.) At any one time, there are dozens or hundreds of people logged in (each with a personal info page), and most are willing to help you learn about photograpy -- digital or old-style -- or buy or sell stuff.
I've been posting selected photos there for a few years now, since long before I set up a photo section on this site, and around the same time I started submitting to MacDesktops. Photo.net is a great site.