It just occured to me in the last few days that I should probably do a complete backup of my flickr account. I came across these apps which seem useful but not all of them are cross platform apps.

• http://code.google.com/p/onairbustour/wiki/flump
• http://www.callingshotgun.net/about/migratr/
• http://code.google.com/p/offlickr/

Migratr seems to be the most useful as it tries to grab album/set information, it appears to be a windows only application.