I'd like to create a separate template for displaying full size images-- maybe without the left nav.

As for image feeds-- yes we're working on this. Just as with blogs, we'd rather not reinvent the wheel and/or ask people to uproot themselves from the services they are currently using. There are a couple options for allowing image rss feeds, a "flickr picker" and other modules I' trying out on the dev site.

I'll post something soon for you (Jonboy, Super RSS Beta Tester) to try out.

As always, thanks for the feedback, Admin Maj