There are also heavyweights like Microsoft who are sponsoring the bill. My guess is there are still more money being invested to make this a reality than otherwise.
It doesn't look like Microsoft is directly lobbying either way, but the Business Software Alliance has been lobbying heavily in favor, and Microsoft is often considered the dominant player in the BSA.
Microsoft's pro-PROTECT IP [1], though I don't think they've made a statement on SOPA yet. They are, though, as pointed out, a member of the BSA, which is very pro-SOPA.
It must sucks to be a bright hacker that work for Microsoft.
Don't you think people who ought to know better should be opposing this bill? If we could get Bill Gate on board, that would be great. I mean, he already have billion of dollars, why should he care about making more money?