I wasn't sure whether this should be posted here or NAF, but since there's been recent threads here on pho and the site is food-related, thought I'd post here. I can move if mods see fit.
I just stumbled on this site (see link) as I was googling for pho recipes. At first glance, looks very informative and fun. Covers the history, how tos, and even has fun pho fashion (you can finally get that "Pho Shizzle!" t-shirt you've always dreamed of).
Check out the blog and restaurant finder. The blog has some good links to old SFGate articles. Restaurant finder isn't comprehensive, but does cover all US states and takes user submissions.