The mind bomb of XmlRpcFilteringPipes and a web command line
To steal a page from Dave, I think that this could be a potential mind bomb: The XmlRpcFilteringPipe.
I know I'm not the only one who's thought of it.
In the process of looking for "prior art" right now.
(Okay, yeah, that sounds pretentious. I just wanted to have Mind Bombs on my site, too. :) )