The trackpad works in Win7, but is extremely touchy and I find it a bit too difficult to use. I'm still waiting for the time I accidentally delete or move something without knowing it.
Disclaimer: I have not installed the Bootcamp drivers from a OS X boot disc (I don't have one on me)
The sound does not work, I have tried the Realtek drivers, but still no sound. My trackpad is functional but not to the same extent as in OS X. There is no 2 finger scrolling, no pinch zoom, no 2 finger click for right click. I have to hold option and click for a right click.
Windows 7 Aero is also not working on my device. I'm taking my Mac to work today to have them install the bootcamp drivers off an OS X disc to see if this clears it all up (it should).
Mac Specs: Black Macbook C2D 2GHz 3GB RAM 250GB HD
If you haven't installed the drivers yet, then none of what you mentioned are actual concerns (or more practically, we can't discern which ones are actual problems and which ones are the result of not having installed the drivers). It's a bit disingenuous to post something like that.