There are a few MMO now which offer the server transfer service for a free. I am sure some ppl would be willing to pay a minimal fee to get a character transfer...?
Only problem would be Inventory contents etc. Or we would have the same problem as with the idea of merged mail for across the servers could end up with an economy crash on the servers and like 8 assassin masks on one server etc etc etc.
I would still like a transfer option though! Coz I am naughty like that hahaha! 