The only reason I'm exploring using something other than Privoxy is that proxies can only block non-SSL connections, and that's finally beginning to matter.) (No I don't want to MITM myself, that's too much work.)
Any of you using Adblock Plus for Safari? As far as I can tell, it just doesn't fucking work. Domains that I've added to my filter list are still loading, and I don't see way to feed it a URL and ask "are you gonna block this or not" like Privoxy had.