I have a 2010 MacBook Pro 13" that is experiencing the freeze issue, but in Windows 7 bootcamp.
I have isolated problem (at least, my problem) to the NVIDIA drivers. I am talking about BOTH the bootcamp drivers that come with my MacBook Pro AND the drivers that are automatically installed by Windows 7.
When I do a fresh clean install of Windows 7, it loads fine. The moment I install the NVIDIA GeForce 320M drivers OR install all the bootcamp drivers, and then reboot the computer, the system will freeze after the "Welcome" screen. How do I know the drivers are the problem? Well, I boot into Safe Mode, Windows loads fine, I then uninstall the NVIDIA Drivers. After rebooting normally, the freezing starts happening again.
I've called Tech Support, and they said this was an "isolated issue" meaning not enough people have reported this. I don't see how this isn't widespread, I am installing Windows 7 via Bootcamp on a fresh Mac OSX I've barely touched. MacBook Pro is fresh out the box. They told me to visit the Genius Bar, which I did, and they "escalated the issue" meaning they are trying to push it to the Apple engineers.
I am convinced that these random freezings, at least mine, are due to NVIDIA's drivers.
The next step for us is to wait it out while repeatedly bringing this issue up with Apple... Either that or, a very experienced coder can put together a 3rd party patch that can temporarily alleviate this problem.