[dang]

Sure. And I don't mean to discourage you from sharing good work. Think of Show HN as a list of "new things to play with". If the community has already tried out your base service, a repost isn't a new thing to play with (at least not at first sight).

But if it's a new service, or there's something major for people to try that they couldn't have before, that might make a fine Show HN in its own right. In that case the title and the post should present what's new, and it should be more than just an incremental upgrade. That line is admittedly fuzzy, but this is about as clear as I can make it.

[kentonv]

The guidelines say that "new features and upgrades" shouldn't qualify for a post, but the separation between "new features" and "new products" is often pretty unclear, and sometimes the same code can be marketed either way. IMO it might be worth expanding on this in the guidelines.

[dang]

No question about it, but I don't know of a clearer criterion. Any suggestions?