I'm curious, why the comment, "I know the image galleries will probably break someday when Flickr sunsets." when you have no issues using Gist? I'm genuinely interested in your take since I struggle with the "cloud" vs. owning my own data. I'd prefer to have all my content self-hosted, but see the appeal of using services like Gist, Flickr, etc.
Oh, I have the same concerns there, but they're really non-concerns. Just like my Flickr images, I keep all of my gists as text files locally as well and can drop in a new system with a simple search and replace. The only reason galleries are different is that I don't store my photos as collections locally, so the organization would be lost.