Flash Image Gallery is a great application to publish your photos, it has many features and effects to your photos, but use it more easily than other gallery scripts just as Gallery, 4images … only thing you must do which is embed it to your website.
In my opinion it is divided into 2 main types: Flash Image Owner Hosted Gallery (the author upload their photos to their hosting) and Flash Image Services Hosted Gallery (e.g: images from Flickr, Picasa..) that name is set by me, so it may be different if you want.
Flash Image Services Hosted Gallery
There are many photo sharing services on the internet but only 2 services share and store images more users which is Flickr and Picasa, of course I will refer to 2 for this service.