Here is the best way to follow the postmortem career of Seung-Hui Cho, at least until his first book, DVD, or podcast comes out:
The Lede at The New York Times: Virginia Tech Massacre page
The Lede is the most conscientious effort of a 19th-century media outlet to cope with the 21st-century news cycle.
The Washington Post: Virginia Tech Shootings page
WP is geographically the major newspaper closest to the event.
MSNBC: Massacre at Virginia Tech
NBC is Cho’s de facto literary executor.
CrimeBlog.US is a serious team blog and a portal to crimeblogging in general.