Just posted a link in the laptop / netbook forum for a
Dell Mini 9 special through tomorrow. $249.00
Notebookreview.com has pretty thorough reviews of most netbook models out there. I included the link to the mini 9 review.
You can compare the units yourself using their site.
Acer Aspire one
Dell Mini 9
MSI Wind
Lenovo S10
HP 2133
Asus Eee PC
etc..
I'm rather fond of my Aspire One. it does OK for the specs, most of the netbooks are similar low spec machines..
I did like the Lenovo S10 with access panels to get to all the important bits for upgrading Memory, wireless, etc.. but the deal I found on the Aspire one at the time was too good to pass up.
the nVidia
ION platform looks promising. A GOOD GPU in a netbook.. but those weren't around when I bought mine.
http://www.nvidia.com/object/IO_73301.html Probably in the higher price range though.