relatively short PAC file for bypassing GFW and blocking ads on iPhone.

simple.pac

function FindProxyForURL(url, host) {
var p = "PROXY example.server:1989";
if (shExpMatch(host, "*twitter.com*")) return p;
if (shExpMatch(host, "*t.co")) return p;
if (shExpMatch(host, "*bit.ly")) return p;
if (shExpMatch(host, "*j.mp")) return p;
if (shExpMatch(host, "*facebook.com*")) return p;
if (shExpMatch(host, "*facebook.net*")) return p;
if (shExpMatch(host, "*fbcdn.net")) return p;
if (shExpMatch(host, "*twimg.com")) return p;
if (shExpMatch(host, "*twitpic.com")) return p;
if (shExpMatch(host, "*yfrog.com")) return p;
if (shExpMatch(host, "*img.ly")) return p;
if (shExpMatch(host, "*cl.ly")) return p;
if (shExpMatch(host, "*campl.us")) return p;
if (shExpMatch(host, "*wp.com")) return p;
if (shExpMatch(host, "*wordpress.com")) return p;
if (shExpMatch(host, "*posterous.com")) return p;
if (shExpMatch(host, "*delicious.com")) return p;
if (shExpMatch(host, "*.static.flickr.com")) return p;
if (shExpMatch(host, "*google.co.uk")) return p;
if (shExpMatch(host, "*google.com.tw")) return p;
if (shExpMatch(host, "*googleusercontent.com")) return p;
if (shExpMatch(host, "*groups.google.com")) return p;
if (shExpMatch(host, "*doc.google.com")) return p;
if (shExpMatch(host, "*spreadsheets.google.com")) return p;
if (shExpMatch(host, "*vimeo.com")) return p;
if (shExpMatch(host, "*youtube.com")) return p;
if (shExpMatch(host, "*ytimg.com")) return p;
if (shExpMatch(host, "*googlevideo.com")) return p;
if (shExpMatch(host, "*tumblr.com")) return p;
if (shExpMatch(host, "*blogspot.com")) return p;
if (shExpMatch(host, "*blogger.com")) return p;
if (shExpMatch(host, "*foursquare.com")) return p;
if (shExpMatch(host, "*feedproxy.google.com")) return p;
if (shExpMatch(host, "*feeds.feedburner.com")) return p;
if (shExpMatch(host, "*upload.wikimedia.org")) return p;
if (shExpMatch(host, "*dropbox.com*")) return p;
if (shExpMatch(host, "*appspot.com*")) return p;
if (shExpMatch(host, "*imdb.com")) return p;
if (shExpMatch(host, "*code.google.com")) return p;
if (shExpMatch(host, "*android.com")) return p;
if (shExpMatch(host, "*thehitlistapp.com")) return p;

var b = "PROXY 203.208.39.104:80";
if (shExpMatch(host, "*fusionads.net*")) return b;
if (shExpMatch(host, "*mobclix.com*")) return b;
if (shExpMatch(host, "*iadsdk.apple.com*")) return b;
if (shExpMatch(host, "*ad-maker.info*")) return b;
if (shExpMatch(host, "*admob.com*")) return b;
if (shExpMatch(host, "*adwhirl.com*")) return b;
if (shExpMatch(host, "*tapjoyads.com*")) return b;
if (shExpMatch(host, "*doubleclick.net*")) return b;
if (shExpMatch(host, "*googlesyndication.com*")) return b;

return "DIRECT";
}