I'm not very familiar with Publisher and the version I have is 2003. But, by default, the number is not printed on the cover page, is it? And, I just discovered, while looking at one of the catalog templates in Publisher, that the page numbers on pages following the cover are deletable objects. I can just click on the page number, causing a Text box border/control tool to appear, and then hit Delete. That removes that object; this can be applied to only the page immediately following the Cover page, and the remaining pages can be left alone.
Does that all seem to apply to Publisher 2007?