Still, relax, Hugo. According to some, Twitter and Facebook's role in protest organizing might be the least of your concerns. Many of the anti-Chavez tweets are in English, suggesting an appeal towards a foreign audience, not to ordinary Venezuelans. Nevertheless, there's still quite a few Spanish tweets, and Chavez doesn't have the control over the Internet that Iran seems to.
It will be interesting to see how, or if, this unfolds.