The manufacturer's support site for what few 7 beta drivers can be found at this time. You have to remember one thing namely that 7 is beta not a finished retail/oem product already seeing all types of drivers available to start with.
Most of us are simply using the Vista even XP not 7 drivers available to get those working especially for addons like web cams. To get the 64bit beta online here I first have to use XP 64 or Vista 64bit drivers for a new adapter.
If you rush into a beta expect beta reality there. Some things are simply going to be not available if the existing drivers won't work. This is the one thing too many don't even look at while expecting everything to work like a finished product with full support.
All anyone here can do is offer some tips from things learned as we go along. I got a tuner card working on 7 here with XP drivers installed. Someone here running 7 on the exact same make and model laptop you have there may have a few ideas you can try out since they are running into the same or similar problems.