I don't think crowdfunding is a model that'll ever really work too well with Bitcoin, at least not in the foreseeable future. Volatility might either massively enrich the proposer by the time it comes to fruition thus enraging the funders, or if it goes in the other direction they won't be able to buy the pot they need to piss. Either way someone's losing out. And that's before we even get to the potential for scamminess.
You are right there in that that's a part of it, though I believe the fact that every kickstarter clone that has come up that has accepted BTC so far has looked like it has been made in 30 seconds by some cheap outsourcing company. There's plenty of ways to get around volatility, for instance using a payment processor to convert to USD. It cheapens it a bit, but it'd work.
