I dropped KK on an old Dell Inspiron 1200 yesterday, because the XP on it had finally given up the ghost.
Seemed pretty good, except as you note the system doesnt seem to like wireless. It doesnt register my Dell 1350 WLAN card. It seems to see it being inserted, but doesnt power it up.
Not really sure how to fix this, looking in old forums.
Otherwise, IMHO, nice job out of the box. Wired LAN worked fine, as did all other hardware.