We have Bell Advantage High Speed Internet for business...basically the Sympatico High Speed edition at a higher price for business. The connection is unlimited usage, however they disconnect the line on average once a day. This isn't a problem as I've programmed a perl script to detect the network outages and reconnect, but it's still annoying. I've got @Home cable at home. The DSL service from Bell seems to have lower latency (low pings) but maxes out at 100KB/s (~800Kb/s). The cable modem has higher latency (higher pings) but maxes out at 600KB/s (4800Kb/s) on a good connection.
Bell had a really difficult time getting the service installed...it took them more than a week longer than they told us it would take, but now everything seems fine.
-GL