Recently I got Helio PDA and I decided to try linux there. Here it goes:

vh-tools (practically dead)

This project seems to be dead for a long time. I had no luck trying their image, so no screenshots here. :)

Pocketlinux (officaly dead now)

they don't support helio port anymore. Anyway, that was the first linux kernel wich I was able to actually boot on this device. Look here

Picolinux (ltest snapshot 20010805)

Seems to be actively developed project. Look here