After installing the windows 7 RC, the keyboard, trackpoint, and wireless were not working on my Lenovo X60 tablet (external devices would work, but I could not even turn the wireless device on). This is apparently a problem with many lenovo machines discussed on this forum, and I thought I'd summarize here. What worked for me:
--open device manager
--select the mouse or keyboard device and open properties
--click "update drivers"
--search for drivers on your machine in C:\ and check "include sub-folders"
The app should find the drivers and may prompt you to restart.
For the wireless driver, I needed to use a second computer to download the correct driver directly from the manufacturer (Intel, in my case), put it on a flash drive, then install it on the X60 tablet. The install did not work correctly at first, but I was prompted to try again using the correct settings, which worked. Now, everything appears to be working smoothly.
--Nancy