If Ricochet was still around, I think this could still be done.

Slashdot linked to this story about the Ricochet network potentially being brought back online by a Denver company. They plan on marketing it as an alternate to dialup in areas not serviced by other broadband options (Plenty of pockets of those here in Colorado Springs), and pricing it at $39 to $49. And this right at the perfect time, as Earthlink bought my CDPD provider Omnisky.