The new trackpad update finally makes the trackpad usable in Windows and I don't have to use mouse all the time when I'm working with Windows. The trackpad is still quite sensitive, but much better now. I'm happy (although I'm angry that it took 10 months to correct the problem). The older trackpad driver also conflicted with Flash in every browser (whenever I scrolled over flash area, the flash began to have graphic issues and the browser crashed). That also seems fixed now.
I was able to install the update to Windows 7 manually (Apple's automatic update software didn't install it correctly). After the file has been downloaded from Apple's site, change the file settings to 'Run in Vista mode' or something like that. It helped and the installer finished correctly.
Someone was missing that Bootcamp icon in Windows 7. I had a similar problem. The drivers which were on Leopard disc worked correctly, but the updated drivers (from Apple's site) didn't work. So, I didn't install the updated drivers. In my case, the updated drivers also messed up some keyboard function buttons (volume etc).