We can signal our dissatisfaction by simply writing in the name of a more progressive Democrat in the primary. Let Obama wonder if the write-ins will turn into more write-ins or non-votes in the general election. If enough people do it he will have to pay attention. Another advantage is that it takes almost no organization- it doesn't require campaigning, funding, encouragement, or even permission from the write-in "candidate."

I'm thinking of voting for Anthony Weiner. Or maybe I'll vote for Paul Wellstone.