OGPlanet has a side-scrolling MMO plat-former type RPG, sort of like MapleStory, but I find it better and it's 32b instead of 16b.
The sprites and graphics benefit from this greatly, and guilds/quests are fun. The markets powered by the users aren't super-duper overpriced, either.
I've been playing it for a bit, and I really like it.
LaTale Link Here
An old video of LaTale gameplay.
Boss rush-ish with music from Touhou imposed over.
Oh, and there's PvP too.
It also has natural in-game game-pad support for if you want to use a controller instead of the keyboard.
