Have started tidying up a Linux kernel for Eken M001 & similar devices (tablets and netbooks), based on the source release that came from VIA last week.
Very, very, early days yet. http://github.com/projectgus/kernel_wm8505.
Not all of the WM8505 functionality is available in source form yet, in particular VIA have chosen not to give us the video source for some reason. So there's still quite a lot of work before this will be suitable for an Android 2.1/2.2 port. But it's a very solid start.
EDIT: Source for all drivers is now available except for the SD/MMC driver. I suggest joining the Google Group if you're interested in this stuff.