In Portland, a city-wide day of pamphleteering has been organized. To participate is simple: download a pamphlet, make some copies (at home or at Kinkos), and stand outside your local grocery, video, or beer store (anywhere is good)-- or simply drop off some copies at a cafe or restaurant. To help make this action successful, all that is required is a half-hour of your time.
The recent events of Oaxaca are nowhere to be found in the mainstream media, and is thus all the more important a reason to spread the word. The more that people know about this, and the more pressure is put on our media/government, the less the Mexican government can act with impunity to jail, assassinate, and 'disappear' hundreds of innocent people.
Get outside and go to work!