Flickr

Flickr is the gold standard for photo hosting on the web.  Used by many professionals, it is easy an easy way to develop an image presence on the web that is widely known and easily found.  The free account is pretty powerful but has limitations on the number of galleries you can have and the total number of images visible at a given time  (3 galleries max and the most recent 200 images visible).  Upgrading to a pro account gives you pretty much unlimited space in both regards, and is only around $25/year.

Here's an example of a free flickr site.  It works for people as well as objects!