While I hadn't spent a lot of time wondering what coaches are allowed to use during games, this NYT article details the technological prohibitions of the NCAA. It also contrasts this with the NFL and high schools.
A few lines from the article:
"Bylaw 1-4-9a prohibits football coaches from using “motion pictures, any type of film, facsimile machines, videotapes, photographs, writing-transmission machines and computers” to make decisions during a game or between periods."
And one for the blog-o-sphere:
"The organization has also attempted to limit blogging by reporters during sporting events."