And yet you describe something which sounds ideally suited to Node (or any evented system) and call it infeasible. Node actually has pretty nice bindings to C (well, really C++), and I see nothing in your post that it would be incapable of.
If it was because you don't know (and didn't want to learn) Javascript I could understand, but in terms of your comment above it seems like you just didn't look hard enough.
not sure why you're being downvoted here, but I do agree on the c++ binding infrastructure. I think the things he listed are quite possible in node -- I can't see any of those things he listed that might be cpu bound.
A fairly popular small DNS system was written in node for the purposes of development. Anyone who uses "pow" knows what I'm talking about: http://pow.cx
If it was because you don't know (and didn't want to learn) Javascript I could understand, but in terms of your comment above it seems like you just didn't look hard enough.