I'm not from the US. Is there anything I can do to help oppose SOPA/PIPA?

So far I've assumed I'm not eligible to call US senators/ congressmen, or sign the whitehouse.gov petition. Am I wrong about this? Is there anything else I can do instead?

All the blackout messages I've seen today don't appear to have much info for the rest of the English-speaking world about what we can do to help.