Ask HN: I want to build my own Android phone. Where do I start?

I want to build my own phone at home. As a kid, I remember building my own PC from a kit (or going to Fry's). Where do I even start if I want to build a phone? Forget about form factor, it won't be sleek or tiny. Where do I get drivers and silicon? Has anyone seen any good books or manuals on the topic?