Ed Felten has posted his testimony (pdf) and has some thoughts about the process of informing senators about technology in a committee hearing:

If you haven't been to such a hearing, you might be surprised at some of what happens. For one thing, unlike the hearings you see on TV, some of the Senators are absent, and some come and go during the hearing. (A Senator is on multiple committees, and various hearings are going on simultaneously, along with other business.)

You would probably be disappointed as well at the quality of the debate. It's not that debate doesn't occur; and it's not that the issues at hand aren't important. But much time is wasted on posturing that is irrelevant to the nominal topic of the hearing and seems designed only to show that one side is purer of heart than the other. An example was the repeated references to porn on P2P networks. This had no connection to the hearing's topic, and nobody even bothered to connect it to the topic. And none of the witnesses had any connection with P2P technology.

And he was seated next to Jack Valenti, "eternal head of the MPAA." Read the whole thing; it's a terrific window into the process that few people get to see.