What's the latest version of Boot Camp Assistant that can be installed on Snow Leopard? And also, where do I download it? Currently it says Boot Camp Assistant is version 3.0.4. And Software Update says everything is already up to date but I see some people say they have version 3.3 on Snow Leopard so yeah I'm rather confused.
Apple Insider says 3.3 update if for people using Boot Camp 3.1, maybe that's why. 

Did you try downloading it directly from Apple's website ?