This question would be well-suited to both SO and Webmasters. (Maybe better suited just to Webmasters, but there is enough traffic about reducing HTML load latency on SO that I would like an excellent question / answer here that can help stave off duplicates. :)
I think it'd be super if there was some way to symlink / hardlink this question and answer between the two sites: it would bring a larger audience to bear on editing it, and it would have only a single copy to maintain for those who would like it to be in sync on both.
So: is there any mechanism for symlinking / hardlinking / linking questions on multiple SE sites? If not, is there enough reason to build one?