Sadly the OS X friendly netbook segment hasn’t.
Probably the best 2 supported models are the Dell Mini 9 and mini 10v.
Both have full working wireless and wired ethernet, audio and video.
Plus they have an excellent support site @ http://www.mydellmini.com/
If you are looking to buy a netbook to specifically run OS X on, it would be
difficult to do better than either of those 2 models.
You can currently snag the Vostro A90 (all black version of the mini 9) from Dell for $184. Had 8 gig SSD and bluetooth.