I set up a server that limits bandwidth through it to max dialup speeds, with rate limit buckets per-IP: https://dialup.moveything.com/. It has some gifs, progressive jpegs that are fun to watch load, and a mirror of xkcd.

Love it! A couple feature requests though:

* support limiting to 33.6 kbps, 14.4, etc for real nostalgia

* Add an initial "dial-up" sound and "connect" button that matches those for different speeds (I'll be able to tell the speed by just the sounds, so no cheating!)