Just providing some closure, in case anyone was still out there hoping for a solution.
The Archos 9 was never 100% functional on Linux, but now the touchscreen cannot be made to work on any current Linux distribution. Obviously, without the touchscreen the 9 is a paperweight, so the issue may now be declared dead -- unresolvable.
Previous touchscreen solutions required rc.local to be edited, so to write serio_raw to the appropriate drvctl file. However, this is no longer possible; something in the system has changed, such that drvctl can no longer be written, even by root.
This is a terrible shame, as a crop of new Linux distros were appearing that were working spendidly on the 9, apart from the obvious touchscreen issue. My personal kudos go to Mageia, whose Mageia 3 product was a beautiful and thoroughly modern Linux implementation that still managed to work VERY well on the Archos 9's limited resources. Honorable mention to Bodhi Linux, which provided lots of eye candy and a beautiful, elegant interface while still conserving resources.
So I for one was forced back to Windows 7, but not to the horrible, slow, OEM Starter product, nor to the bloated full installation. My solution was a distribution called Tiny7, which I will not discuss further because
1. It is an unauthorized and heavily-hacked distribution,
2. It is already discussed in depth elsewhere in these forums, and
3. I will never stop hoping for an eventual Linux solution, even though I know no such thing is coming.
Thanks to all who shared their knowledge and experience on this adventure. It was actually fun (at times),
and I wish it could have been a happier ending. But that's real life for you.
Cheers -- Voo