Just received S3 today from Edirol UK. I think it was the American Cakewalk site saying Edirol would be the sole European distributor. I contacted Etcetera (who sold me S2) and they didn't even know at the time if the could get S3, so I ordered from Edirol. Can't quite figure it out whether Etcetera is a little cheaper. Too late by now, anyway.
Have only had a short time to play with S3. Haven't even installed vSampler yet. But so far it looks good. Looks more professional without all the colours on the buttons. On the other hand it probably takes some time to adjust when you have become used to looking for a button with something yellow on it and so on ... Now they are alle bluish grey.