AT&T Broadband v. RCN

I currently have ReplayTV w/AT&T Broadband. Obviously, there's a Replay Guide available for AT&T, but RCN is also in my area, and they have a much better package, so I'd like to switch to them. I haven't been able to confirm that there is a channel guide available for RCN in my area (Needham, MA), though. Does anybody know whether there is one? I'd hate to switch companies and then have to go back to AT&T because there's no channel guide available.


Addendum: Actually, I now have conflicting information on an RCN guide. The ReplayTv website shows that there should be an RCN guide, but when I force a net connect, my only options are AT&T analog, AT&T digital, and Cable ready TV. Could this be because I have an AT&T branded unit? Could they have doctored the system so that I can't use it with any other cable provider?


Thanks, Mitch