I've been blogging recently about two twin evils (in my opinion) that are bearing down on the Internet and the way we use it. The first is an attack on Net Neutrality by the Telcos. The second is a new bill that will be proposed called the Intellectual Property Protection Act of 2006. Both are serious threats and stem largely from greed and I urge you to read more and be active in contacting your Congress folk about your feelings.
A Save The Internet campaign is ramping up and there's a handy little video here if you want to take a peek at it, that explains what's at stake. You really should be concerned with this.
tech.memeorandum has more about this here.