Last month I had to use the ACM Word template to format our IIiX 2010 submission, and found that document to be flawed as a template because it did not use styles to specify appearance, and thus did not make an easy-to-use template. I took the liberty of generating a Word template (.DOT) file that I believe captures the formatting requirements correctly but does so in a way that makes it easy to create new documents from it. Note that this template differs from the CHI template (on which it is based) in some ways, most notably in the numbering of sections and in the formatting of references.
I would like to make the template available on the ACM site for use in future conferences, and am open to suggestions as to how to do that. In the meantime, here is the new template. There are a number of conferences coming up that use this template. Please let me know if you have any problems with it, or find any incorrect styles.