The first line of defense is simply to up-vote posts like this on HN and Reddit, as well as posting to Twitter and Facebook. The more people who know about it, the more fuss we create. I know that's not much, but it's how we've beaten greedy initiatives like this in the past (SOPA).
I agree with you though, if it were made dead simple to contribute in some way towards an initiative against this specific bill and others like it, I'd of course donate.
People also need to vote with their dollars. I understand thats only part of it but its a necessary part. Look at what T-Mobile has done for wireless plans, if more people switched to them for example, I'm sure AT&T/VZW/Sprint will wake up and start offering better pricing/plans. It won't fix the issue, that boils down the law makers need to make the landscape more competitive and easier to compete in. But at least it helps in the short term.
I've been waiting to switch to T-Mo for months now, but they've got incredibly poor reception in my (urban) area. And I'm not talking 4G, I'm talking about basic calling/texting.
I agree with you though, if it were made dead simple to contribute in some way towards an initiative against this specific bill and others like it, I'd of course donate.