Automatic inclusion of various AMS math packages. Options to set bibliography in smaller type. Required now that ACM's printing subcontractor is asking for latex source. I'm not kidding.
Section headers are in all caps.
I recommend using jeffe.sty to redefine ACM's ugly captions, theorems, and proofs. Especially useful with euler.sty , which sets up the AMS Euler math fonts. Supports the url field, with angle brackets as per AMA guidelines. Works around geom.bib's confusion about volume and number for proceedings papers. Requires url.sty .