In general terms picture heavy is bad. Use thumbnails on the main page to get to pages with a lot of pics or graphics. This will let the dial-up users at least access the main page with as little hassle as possible. Make graphics as minimal as possible for the same reason.
Also, it depends on who the target audience is for the page. If the page is consumer-targeted, keep it simple as many still have dial-up accounts. If the page is business-targeted, you have more options as most businesses now have some type of enhance-speed connnection.
Brad