World of Warcraft
Aion
Perfect World
Forsaken World
Ether Saga Online
Jade Dynasty
Warhammer
Age of Conan
LOTRO
Rift
New MMOs coming WITH jump:
Star Wars: The Old Republic
TERA
Guild Wars 2
Blade and Soul
ArcheAge
Congratulations, for every MMO you list where you can't jump, someone can probably list two where you can. So please, don't even get me started. Funny, one of the companies that makes a few games you listed has no jump on their older titles, while their newer titles will have jump. Maybe that says something?
Oh, and SC2 isn't listed as an MMO either. It has online function's yes, but it is an online RTS. As for Demon's Souls, the (M) in (M)MO stands for massively, can you play with hundreds/thousands of players at once in that game? I'm not sure as I haven't ever played it, but I think not.
On a side note, while MMO does indeed stand for Massively Multi-player Online, most people that refer to them on these forums are probably shortening the term from MMORPG (Massively Multi-player Online Role Playing Game) and SC2 is not in that genre at all.