Depends on what you are using on your website. Pure HTML? Flash? is it a blog?
Easiest way is if you are running a blog on your website. There are several Wordpress apps available (even an official Wordpress app), and I think there are some that work with Blogger as well. You can upload photos with them as well.
If you are working with straight HTML, I don't think there is a WYSIWYG editor for the BB, but there are FTP apps for uploading to your website. You can pretty much upload anything to your website with those.
If you use one of these gallery's on your site, it will pull any image in a predesignated image folder to add to the gallery.
I need to find out about ftp from the bb. If I can ftp to a folder, I can make this work from my bb by just adding images from my bb to the folder...not a bad idea.