I have archlinux running nicely on a latitude C600, a bit older than what you have. Very happy with the way the old brick runs, even got direct rendering of graphics. (Dual booting with WinXP which is a pig, nearly ready to ditch it.)
Wireless? Well that depends upon the chipset, do a google and see what you find. If the worst comes to the worst you can always get a usb wireless interface - cheap and handy.
Try looking at linux-laptop
for more info on your model.
Suse? ... hmmm maybe a little bloated for an 5yo box.
EDIT out of curiosity I had a look here
and found that your wireless chipset should be well supported