In particular it seems like a really good thing to set up twitter/web proxies for Iran - see http://di2.nu/_i7g3 (windows) or http://di2.nu/_vLg3 (linux) or http://di2.nu/_DLk3 (mac) - and communicate them to as direct message (DM) tweets to @stopAhmadi or @iran09. Do not broadcast the proxy server address directly as the Iranian ISPs are monitoring twitter and will block those addresses.
It occurs to me that you could mischeviously suggest sites that you know are not hosting proxies be targetted...