Looks like I got SAS to change thier homepage... under travel info/intercontinental/econonmy extra last week it stated "all seats have a pc power outlet". This week it says "seats have access to pc power outlet". I fell like I have acheived something!
Indeed, I got an email today from SAS CR saying that "every second seat has a power outlet, so it usually is not a problem".
So, if you need to use your pc in econ extra, make sure that you book a seat that has the connection. If you are travelling with a colleague and you both need to use the outlet, do no sit together.
Or just travel with LX and pay the same price for their J/C class instead, providing you book early...