This was buried in a different thread, so I decided to move it. Here's how to number pages in Pages 3.0.3, i.e. Pages '08 in iWork '08. If you want to number by having "2" appear on page two, and "1" invisible on page one:
Under "View" drop-down menu, select "Show Layout"
In inspector>Document (far left icon)>Document>check Header or Footer
Under "Insert" drop-down menu, select "Page Number" on desired page (2)
Format text -- font, font size, location
Click somewhere in body text
In Inspector>Layout (second icon from left)>Section>Check "first page is different"