According to OneDayBlogSilence.com:
Silence can say more then a thousand words.
This day shall unite us all about this unbelievable painful & shocking event and show some respect and love to those who lost their loved ones.
On April 30th 2007, the Blogosphere will hold a One-Day Blog Silence in honor towards the victims of Virginia. 33 died at the US college massacre.
The Blogosphere is in deep mourning.
All you have to do is spread the word about it and post the graphic on your blog on 30th April 2007. No words and no comments. Just respect and empathy.