Grabbing Everything From Flickr?

We have a paid Flickr account for archiving photos and sharing them with family members. I'd like to grab everything that I've uploaded and stick it in a safe place, but Flickr doesn't provide "download all" functionality. Neither does the open source tool FlickrDown: it only grabs photos that have been put into sets, and most of our early ones haven't. I suppose I could look at the API docs and write something, but flippin' heck, someone must have done this already---pointers would be welcome.