As the chairman of U-CAN, I though I'd offer a few clarifications.
- As others have already pointed out, the caps vary from provider to provider and XMission offers a 500GB cap on the 50Mbps tier. I'd say that 99% of users are unlikely to exceed this, so it seems fair to me. That 50Mbps tier is $55/mo; the 15Mbps tier is $40/mo.
- While I blog about UTOPIA and fiber projects at »www.FreeUTOPIA.org, it is not an official website for U-CAN.