My hp1233 netbook has been sitting around in my office for the last six months after the last Ubuntu upgrade. It was working fine, but the Natty Narwhal (11.04) upgrade caused it to hang when using wifi. See Bug #772859
So the end of last week I plugged it into my network switch and upgraded to Oneiric Ocelot. I was pleasantly surprised that the wifi now works and didn’t require any fiddling around with random drivers or configs. Nicely done Ubuntu Team!