I'm pleased to say that i've been working with DSG to help release the source ready for developers to work with straight away and with that in mind, the kernel source is available to download now from my GitHub.
You'll find two versions available - the standard one (which I have successfully compiled on Linux and deployed to my Vega) and a version for compilation on OSX (also successfully compiled and deployed). I've built my boot images using the mkbootimg arguments '--base 0x10000000 --pagesize 2048'. The Vega boot image ramdisk is also on my GitHub.
Let the fun begin!