Just be careful if you want to use X-64 version of Windows 7 and are connected via a WIRED LAN connection.
A lot of laptops use the VIA VELOCITY gigabit ethernet adapters. These are mainly 32 bit and WON'T WORK on x-64 (including x-64 VISTA) VIA Velocity Gigabit Ethernet Controllers - VIA Technologies, Inc.
Wireless usually works and you can use a PCI express adapter or a usb==>lan adapter in these cases.
If you have a Networking card similar to those listed in the Via velocity link then don't even THINK about trying to find 64 bit drivers