Currently the HELIO is only available with the proprietary VT operating system. See FMS for information about the Linux port.
The manufacturer of the HELIO is VTech .
vhl-tools (dead link) , a SourceForge project, works on utilities, patches, documentation and integration of Open Source software for Linux on the VTech Helio PDA.
PocketLinux has a port under the GPL, as well as Debian and Redhat packages. But the URL http://www.pocketlinux.com/ seems no longer available.
VR Org cross compiler