It sounds as though someone has found an easy way to access Nintendo Wi-Fi Connection with only a dial-up connection. For those of you interested in giving it a try, a few folks have been kind enough to put together a step-by-step tutorial of the process. It's fairly straight-forward and requires only a few changes to your Internet settings. More details here. Thanks to N-Sider reader Zak for pointing this out.

Nintendo Wi-Fi Connection using 56k modem