Hello,
I helped a friend of mine with installing Debian by phone, that's why my
diagnostic possibilities are shortened.
After downloading the stable netinst CD, we installed sarge (using Kernel
2.4.27 or so). Then, we modified sources.list to use testing in the future
and did an apt-get dist-upgrade. Afterwards, we installed
linux-image-2.6.16-2-686 to make his touchpad run. When booting to 2.6.16,
the following message appears before dropping into a shell after some
minutes: "Begin: Waiting for root filesystem".