BT and Bulldog are mounting an SDSL trial in 41 exchanges around London in late Autumn. The advantage of SDSL is the first S, Synchronous rather than the Asynchronous with ADSL, allowing both sending and receiving at 1.9Mbps.
Although it’s been announced, it doesn’t look like they really going to be pushing the service, as they estimate upwards of only 500 customers by the end of March 2004. I would have thought any company with a leased-line would seriously consider changing to this, given what will be a significant cost saving but I’m sure BT are very aware of this, hence their lack of ambition for it.