I was happy to find that the realtek 8187se pci chipset on the built-in wifi card works. That particular chipset is not supported by all distros but it wurks fine in all versions of mint that I have used (Mint 9 xfce, Peppermint, Mint LXDE, Mint 10 LMDE XFCE).
The brightness keys, volume keys, and other proprietary "eeePc keys" that allow multiple functions per key work. The speakers shut off when I plug the headphones in.