Bonsai means "tree on a tray". They are very time consuming to take care of. It takes a lot of patience to train a tree as a bonsai, since it takes about 1-2 years for it to look like a bonsai.
This is my first work that I'm really satisfied with... Not that I consider it to be flawless. But is an improvement over the others, nevertheless. :)
Oh, that explains it :D.. I still don't see why you removed the background..
White outline.... Ahm... I remember it had a white background back then... Maybe its the AA? =)
Its awesome, but why the white outline?