I have to sign up by hand? Google? Facebook? Twitter? cmon... its like 10 years ago.

Target audience is developers. Many "people with discerning taste" would prefer not to tie their accounts to third-party accounts.

Your thoughts on this? Would you rather use native cluster or this one? (native: http://nodejs.org/docs/v0.6.0/api/cluster.html )

Back in time when node didn't have clustering built in then the cluster (1) was great but do we need one now?

Thanks for good answer, that's what i was thinking. Just had to approve it. Gonna go with python, have good past experience with it and that would be way more safe than risking it with node.

What i did not mention is that it's gonna be quite lean startup, so time is not that big pressure. And Python/Javascript dev time seems quite equal to me while not on big scale, don't know how its gonna be when I would have to scale it up on Node.