After working with the original EEEPC 701 (a.k.a. 4G) for a couple of months, I decided it would be worth it to upgrade to the EEEPC 900HD. More here
The wireless network card changed to a Realtek RTL8187SE card, as reported by lspci. Recent kernels provide the rtl8187se experimental module, which works perfectly here. With older kernels, rtl8180 is supplied but this didn’t work for me. Alternatively, you can use these modules to get it up and running on older kernels.