Dial-up is so slow once you start dealing in images (web pages, family photos etc.) that dial-up is almost unusable unless you drink a lot of tea!! I have only used dial-up in an emergency, and that only about three times in the last four years since I went on broadband. Even 512 b/band was getting slow for software updates and iMac.
I think that so few people use the dial-up modem that it is not really worthwhile installing one any more. I've had my iBook for 6 months now and the dial-up is not even configured. Most places I've been when away from home have had wi-fi.