Do you live in the exchange?! How much do they cost to rent?

I don't live in the exchange, but I live close (probably <100yds). I'm blessed with relatively new under-pavement wiring, too, unlike some neighbours nearby.
Using a standard BT NTE5 faceplate and El Cheapo phone extension wiring to my modem/router, I got "Line Att." of 6dB and "SNR Margin" of 17dB. Upgrading the wiring/faceplate (roughly £15 from ADSL Nation) cut the Line Att figure to 0dB and SNR Margin increased to 18dB (which I gather are both slight improvements).
Don't think I could squeeze anything more out of my 8meg max connection (short of paying extra for AnnexM uploads or whatever it's called), which is nice to know.
If you don't get the full speed on ADSL2+ I'll eat Matt's hat.
That's good to know. Would that be Matt Francis, by any chance? (Shared a house with him back in the day, think he got a job with you guys and ISTR he did wear a hat from time to time.)
Now I just have to endure the long wait for 21CN to arrive at my exchange... SamKnows shows 21CN PSTN switchover target as Q4 2009 but 21CN WBC Status just above it on the page is 'Not Available', so not sure what to make of that.