Etch definitely won't support wifi and 3D out of the box, it might not even handle the
ethernet. Sid will probably support it perfectly in a few months, if it doesn't already.
Ethernet and wireless are Atheros; ASUS/Xandros support 802.11a/g using 'legacy' madwifi
(which taints the kernel with a closed-source glue layer) but a fully GPL port (ath5k) is in
Linus' tree for the 2.6.25 release:
Googling indicates people have had mixed results trying ath5k on the eee, but since the
successful reports seem to be more recent (and the driver has seen considerable hacking since
it hit -mm a few months ago), I'd expect it to be fine by now.
There's a bare-bones GPL-only debian 'port' called EeeOS specifically targeting the Eee, but
they too are using madwifi. Apparently they needed a patch for the atl2 wired Ethernet driver
too, haven't checked why.
*Everything* else in LSPCI is Intel, straight down the line. Graphics is GMA915; xrandr works