I know re-submissions are a thorny subject for some people. TBH, we've only posted a few things on line so far, and I'm still getting a feel for what's best in terms of posting to HN, Reddit, etc. I am of course biased, but I think a good proportion of the readers of HN will be interested in our stuff, so I don't feel too bad about resubmitting a few times if it doesn't get picked up.
