T1's are dinosaurs. 1.5mbps is barely broadband by today's standards, and you wanna divide that up between a few neighbors? No thanks. My current internet is 16x faster down and 2x faster up. I think I'd rather just pay the overages. Even TWC's crappy plan capped itself at $75 for overages, which would make it cheaper than a T1.
I'm actually not opposed to UBB, but companies like Time Warner and AT&T will never do such a thing reasonably. 20GB cap for standard plan is too low, and $1 per gig for an overage is much too high.
How about lowering the baseline price so light users see some benefit? How about realistic volume pricing?
Won't do the above? Then continue with your fat profits and leave the current system alone.