Kernel 2.6 Project
The Linkstation Wiki 2.6 series linux kernel effort is divided into two projects, one for each architecture - MIPS and PowerPC.
Check this string in the Forum first:
PowerPC
The kernel and bootloader provided here are currently working on the LS1, LS HG and the Kurobox.
When we get access to LS HS, Terastation and other Buffalo hardware either through donations or other means support will be added in for this hardware.
André is the current maintainer of this project, here is his page detailing the Linkstation kernel releases.
MIPS
Work is in progress on a working 2.6 linux kernel for the LS2 (which is based on little endian MIPS).
Currently there is support for this in André's bootloader and Enji has created a bootloader that successfully loads custom kernels.
Does anyone have the link to his wiki? Mindbender