One thing one must understand, there's no easy way to make this kind of games. If that's what someone is looking for, you might want to build a time machine and travel many years into the future. But as of now, as far as easy goes, MMF2D is by far, the easiest engine for this kinda thing. I have done small MMOs tests with up to 5 people, with chat end everything. These were simple tests mind you, but by far MMF proved to be the easiest way for me, Lacewing it's pretty neat plugin. Still, as easy as it might be, a full fledged MMO it's a tremendous amount of work even using tools like C2 and MMF all by yerself, trust me.