One LX port has been done, I'm doing another, and you would hence be the 3rd or 4th. You have contacted AMD I assume concerning redistribution rights for the LX VSA? You are going to need to do that.
The build depends on what you put on the board. The best thing you could do would be to talk to this mailing list a little so we can help you design the board with linuxbios in mind.
Also, do you intend to put linux in flash, for linuxbios to load, or ... in other words, how do you want this thing to boot? There are now several options, so you want to think about how you want it to boot. We've worked with a number of vendors recently on putting linux in the BIOS flash, and having linux load it. They find the debug flexibility very useful. This just started getting to be popular when the 1 MBYTE parts hit the street.
thanks
ron