The Node Beginner Book by Manuel Kiessling.
I ran across this the other day when I was posting Node.js at Scale and just forgot to post it.
Nice introduction to Node.js.
You may also be interested in:
There are lots of other resources but that should be enough to get you started.
BTW, would “lite” servers with Node.js answer the question of who gets what data we saw in: Linked Data Semantic Issues (same for topic maps?)? Some people might get very little “extra” information if any at all. Others could get quite a bit extra. Would not have to build a monolithic server with every capability.