This site says it provides free internet access with local dialup numbers
Yeah, it seems they do. I jumped over to the FAQ section and noticed some peculiarities.

What if I need support?
Dial In Free does not provide free support. If you need help, call our toll free support hotline at (800)713-8030. There will be a $5 charge per incident. Mastercard, Visa, or Discover card payments accepted
If a no-frills Dial In Free account does not suit your needs, consider this special offer:
Unlimited dialup, email, and free support for $12.95/mo, $29.95/ quarterly, or $98.95/yr.
Which goes here:http://services.triton.net/keyword/dialupOffer