Are you sure that you installed Boot Camp 3.0? How about telling us which version of OS X that you used to install Windows 7? The Boot Camp 3.0 assistant is included with Snow Leopard. After you installed Windows 7, did you insert your OS X DVD (Leopard or Snow Leopard) in order to install the drivers and the Boot Camp control panel application?
No, you can not download Boot Camp 3.0 from Apple or anywhere else. But the Snow Leopard upgrade DVD for $29.99 includes it. Once you have 3.0 installed you can download 3.1 and 3.2 from Apple.
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