I just brought an Sveon SNT1020 WiFi USB adapter. It works very well with Ubuntu Linux 10.10, just connect it to an USB 2 port and you can start using it with NetworkManager right away, no drivers or setup necessary. You should possibly disable any built-in WiFi adapters first though. It cost €35.

I finally got the microphone input on my Acer Veriton X270 to work un Ubuntu 9.04. The trick is to uninstall PulseAudio and use ALSA only. It even works in Skype.

I recently brought an Acer Veriton X270. Ubuntu Linux 8.04 works well except for sound. Basic stereo sound output works, but sound input (microphone) and some advanced 3D and surround sound does not work. The front headphone jack does not work correctly either. (All this works in Windows, so it’s not a hardware problem.) Apart from the poor sound support in Linux, I am quite happy with this computer. It’s small (though not super small like Mac Mini or Fujitsu ESPRIMO Q), quiet, has all features you need and works out of the box.