Well, WebWasher doesn't even seem to exist as a home-user stand-alone proxy software anymore, that would be a point for a change I have to admit
I guess this calls for some thorough testing of currently available proxy software.
(btw, the more I search for resources on the speed advantages of 0.0.0.0 over 127.0.0.1, the more opinions I find... for both sides, with 0.0.0.0 slightly leading )
Since I agree this is an important topic, I've created a project manager entry about it.