If the mainstream press ignores this movement everyone will know it because we are successfully spreading the word via the web, email, and through a variety of (relatively) mainstream progressive media outlets. This time around any lack of coverage will be glaring because we are building so many alternative information networks that are spreading the j20 general strike/protest message in an historically unprecedented manner. Even through word of mouth (over talk radio) we can literally call Bush's "mandate" into question if enough people are ready to stand up, speak out, and strike -- and many obviously are.
The viral idea may be coming into it's own. Cut, paste, forward, and repeat the best of everyone's ideas with minimal effort and everyone can make a difference. Just the volume of protest information will be a story and then the protest will be too.
In closing, more time-tested cliches may be in order...
If not now, when?
If not you, who?
If you don't foment revolution you can't complain.