under XP you can find this in Device Manager under "System devices" (my laptop says Intel 82801BAM/82815), but they probably hid it somewhere else in Vista.
Nah, it's in the same place. Getting to Device Manager is easier though: bring up the start menu and type "device manager" (sans quotes, obviously) into the box at the bottom. Device Manager will appear at the top of the list; click on it.
Apparently my laptop's got a "Mobile Intel(R) 965 Express Chipset Family". Most of the other devices are "Intel(R) ICH8...".