FlickrGettr is a Flickr-API independent tool to download flickr-sets. It has multiple features allowing set-name filtering, choosing picture quality or specifying multiple accounts from which to download sets. It features CGI, Tk, and shell frontends. The CGI and Tk frontends are in a poorly documented beta stage.
Hm looks very good!
I've just read the manual and it looks very good! If I can really get this stuff running on my machine and develop stuff as "easy" as it seems I'm sure I'm gonna play around with it ;)