There are dressmakers, pawnbrokers, traders, teachers etc. in Vvardenfell, but I can't learn these jobs. I just asked myself if it was good to have apprenticeships in Oblivion - I always wanted to forge my own sword and tailor my clothes! In Gothic II, there were apprenticeships, but in TES 3 not!
Speaking of which, I don't know if there will be apprenticeship with any one "master", but that bit about Arcane University in PCZone looks promising. Perhaps you won't be an apprentice, but you can always be a student