Comment by jules

This is good, but they're now charging authors a publishing fee of over $1000 per article (and they say that that is the discounted price). It is unclear whether this is justified. In my experience publishing scientific articles with ACM, all the real work (such as peer review) is done by volunteers. From what I can tell, ACM just hosts the exact PDF + metadata that authors supply. I suspect that in the future, more journals and conferences will switch to an arXiv-overlay model.