Is the wireless turned on?  If there is not a physical switch, try the keyboard (fn-Fxx) shortcut to toggle it on/off.
I've just installed Windows 7 with SP1 64-bit on my Latitude D630 (with Intel integrated graphics, not nVidia).  The system comes up fine and all devices are recognized although the display refresh seems a bit funny at times.I typically install a chipset driver right after OS install but see that Dell has no Windows 7 downloads for this laptop.  Should I use the chipset driver from the Intel site or stick with what Windows 7 installed?Same question applies to video, Ethernet, WiFi, etc drivers....Thanks!
Windows 7 drivers for Latitude D630